feat: Cancel unbonding delegation entry (#10885)

## Description


Closes: #577

This pull request contains `Canceling unbonding delegation entry` and `delegate back to previous validator`

### `Msg` Service
```protobuf=
package cosmos.staking.v1beta1;

service Msg {
    // CancelUnbondingDelegation
    rpc CancelUnbondingDelegation(MsgCancelUnbondingDelegation) returns (MsgCancelUnbondingDelegationResponse);
}

// MsgCancelUnbondingDelegation
message MsgCancelUnbondingDelegation {
  option (gogoproto.equal)           = false;
  option (gogoproto.goproto_getters) = false;

  string                   delegator_address = 1 [(cosmos_proto.scalar) = "cosmos.AddressString"];
  string                   validator_address = 2 [(cosmos_proto.scalar) = "cosmos.AddressString"];
  cosmos.base.v1beta1.Coin amount            = 3 [(gogoproto.nullable) = false];
  // creation_height is the height which the unbonding took place.
  int64 creation_height = 4;
}

// MsgCancelUnbondingDelegationResponse
message MsgCancelUnbondingDelegationResponse{
}
```

### `Msg` Method Implementation
```go=
func (k msgServer) CancelUnbondingDelegation(goCtx context.Context, msg *types.MsgCancelUnbondingDelegation) (*types.MsgCancelUnbondingDelegationResponse, error) {
    /*
    // checking the unbonding delegation at creation_height 
         // get the unbonding delegations of delegatorAddress 
        if ubdEntry balance is equal to msg.Amount 
            remove the entry from ubd  
        else 
            update the specific entry with new balance
                
        if len(ubd.Entries) == 0 {
            k.RemoveUnbondingDelegation(ctx, ubd)
        } else {
            k.SetUnbondingDelegation(ctx, ubd)
        }
    */
    

    // update the delegation back to validator 
    // get validator
        validator, found := k.GetValidator(ctx, valAddr)
        if !found {
            return nil, types.ErrNoValidatorFound
        }

        // delegate the unbonding amount to validator back
        _, err = k.Keeper.Delegate(ctx, delegatorAddress, msg.Amount.Amount, types.Unbonding, validator, false)
        if err != nil {
            return nil, err
        }
    
    
        _, err := ms.Keeper.CancelUnbondingDelegation(ctx,delegatorAddress,validatorAddress,amount,creation_height)
        if err != nil {
            return nil, err 
        }


        return &types.MsgCancelUnbondingDelegationResponse{}, nil
}
```

#### `cli tx` Method
```bash=
simd tx staking cancel-unbond [validator-address] [amount] [creation_height] --from [user] --chain-id [chain-id]
Example: 
simd tx staking cancel-unbond cosmosvaloper1mqtyv4qux68r26mql2hjhgrvz72snjwpulq22m 100000stake 10280 --from test1 --chain-id test-chain
```

---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

api/cosmos/staking/v1beta1/tx_grpc.pb.go

@@ -35,6 +35,9 @@ type MsgClient interface {
 	// Undelegate defines a method for performing an undelegation from a
 	// delegate and a validator.
 	Undelegate(ctx context.Context, in *MsgUndelegate, opts ...grpc.CallOption) (*MsgUndelegateResponse, error)
+	// CancelUnbondingDelegation defines a method for performing canceling the unbonding delegation
+	// and delegate back to previous validator.
+	CancelUnbondingDelegation(ctx context.Context, in *MsgCancelUnbondingDelegation, opts ...grpc.CallOption) (*MsgCancelUnbondingDelegationResponse, error)
 }
 
 type msgClient struct {
@@ -90,6 +93,15 @@ func (c *msgClient) Undelegate(ctx context.Context, in *MsgUndelegate, opts ...g
 	return out, nil
 }
 
+func (c *msgClient) CancelUnbondingDelegation(ctx context.Context, in *MsgCancelUnbondingDelegation, opts ...grpc.CallOption) (*MsgCancelUnbondingDelegationResponse, error) {
+	out := new(MsgCancelUnbondingDelegationResponse)
+	err := c.cc.Invoke(ctx, "/cosmos.staking.v1beta1.Msg/CancelUnbondingDelegation", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // MsgServer is the server API for Msg service.
 // All implementations must embed UnimplementedMsgServer
 // for forward compatibility
@@ -107,6 +119,9 @@ type MsgServer interface {
 	// Undelegate defines a method for performing an undelegation from a
 	// delegate and a validator.
 	Undelegate(context.Context, *MsgUndelegate) (*MsgUndelegateResponse, error)
+	// CancelUnbondingDelegation defines a method for performing canceling the unbonding delegation
+	// and delegate back to previous validator.
+	CancelUnbondingDelegation(context.Context, *MsgCancelUnbondingDelegation) (*MsgCancelUnbondingDelegationResponse, error)
 	mustEmbedUnimplementedMsgServer()
 }
 
@@ -129,6 +144,9 @@ func (UnimplementedMsgServer) BeginRedelegate(context.Context, *MsgBeginRedelega
 func (UnimplementedMsgServer) Undelegate(context.Context, *MsgUndelegate) (*MsgUndelegateResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method Undelegate not implemented")
 }
+func (UnimplementedMsgServer) CancelUnbondingDelegation(context.Context, *MsgCancelUnbondingDelegation) (*MsgCancelUnbondingDelegationResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CancelUnbondingDelegation not implemented")
+}
 func (UnimplementedMsgServer) mustEmbedUnimplementedMsgServer() {}
 
 // UnsafeMsgServer may be embedded to opt out of forward compatibility for this service.
@@ -232,6 +250,24 @@ func _Msg_Undelegate_Handler(srv interface{}, ctx context.Context, dec func(inte
 	return interceptor(ctx, in, info, handler)
 }
 
+func _Msg_CancelUnbondingDelegation_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(MsgCancelUnbondingDelegation)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(MsgServer).CancelUnbondingDelegation(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/cosmos.staking.v1beta1.Msg/CancelUnbondingDelegation",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(MsgServer).CancelUnbondingDelegation(ctx, req.(*MsgCancelUnbondingDelegation))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // Msg_ServiceDesc is the grpc.ServiceDesc for Msg service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -259,6 +295,10 @@ var Msg_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "Undelegate",
 			Handler:    _Msg_Undelegate_Handler,
 		},
+		{
+			MethodName: "CancelUnbondingDelegation",
+			Handler:    _Msg_CancelUnbondingDelegation_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "cosmos/staking/v1beta1/tx.proto",