feat: staking config (#10988)

## Description

staking config to remove DefaultPowerReduction global. 

I want to see if this would be accepted as its easier to document and show users how to do this. 



---

### 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)

simapp/app.go

@@ -267,8 +267,14 @@ func NewSimApp(
 	app.BankKeeper = bankkeeper.NewBaseKeeper(
 		appCodec, keys[banktypes.StoreKey], app.AccountKeeper, app.GetSubspace(banktypes.ModuleName), app.ModuleAccountAddrs(),
 	)
+
+	stakingConfig := stakingtypes.DefaultConfig()
+	/*
+		Example of setting staking params:
+		stakingConfig.PowerReduction = sdk.NewIntFromUint64(10)
+	*/
 	stakingKeeper := stakingkeeper.NewKeeper(
-		appCodec, keys[stakingtypes.StoreKey], app.AccountKeeper, app.BankKeeper, app.GetSubspace(stakingtypes.ModuleName),
+		appCodec, keys[stakingtypes.StoreKey], app.AccountKeeper, app.BankKeeper, app.GetSubspace(stakingtypes.ModuleName), stakingConfig,
 	)
 	app.MintKeeper = mintkeeper.NewKeeper(
 		appCodec, keys[minttypes.StoreKey], app.GetSubspace(minttypes.ModuleName), &stakingKeeper,

simapp/simd/cmd/testnet.go

@@ -282,8 +282,8 @@ func initTestnetFiles(
 			return err
 		}
 
-		accTokens := sdk.TokensFromConsensusPower(1000, sdk.DefaultPowerReduction)
-		accStakingTokens := sdk.TokensFromConsensusPower(500, sdk.DefaultPowerReduction)
+		accTokens := sdk.NewIntFromUint64(1000_000_000)
+		accStakingTokens := sdk.NewIntFromUint64(500_000_000)
 		coins := sdk.Coins{
 			sdk.NewCoin("testtoken", accTokens),
 			sdk.NewCoin(sdk.DefaultBondDenom, accStakingTokens),
@@ -292,7 +292,7 @@ func initTestnetFiles(
 		genBalances = append(genBalances, banktypes.Balance{Address: addr.String(), Coins: coins.Sort()})
 		genAccounts = append(genAccounts, authtypes.NewBaseAccount(addr, nil, 0, 0))
 
-		valTokens := sdk.TokensFromConsensusPower(100, sdk.DefaultPowerReduction)
+		valTokens := sdk.NewIntFromUint64(100_000_000)
 		createValMsg, err := stakingtypes.NewMsgCreateValidator(
 			sdk.ValAddress(addr),
 			valPubKeys[i],

simapp/test_helpers.go

@@ -154,7 +154,7 @@ func genesisStateWithValSet(t *testing.T,
 	validators := make([]stakingtypes.Validator, 0, len(valSet.Validators))
 	delegations := make([]stakingtypes.Delegation, 0, len(valSet.Validators))
 
-	bondAmt := sdk.DefaultPowerReduction
+	bondAmt := stakingtypes.DefaultConfig().PowerReduction
 
 	for _, val := range valSet.Validators {
 		pk, err := cryptocodec.FromTmPubKeyInterface(val.PubKey)