Add GetTx gRPC endpoint (#7688)

* Add empty TxByHash

* Fix search & replace

* Renname to GetTx

* Make getTx grpc work

* Hash as string

* Add todo comment

* /tx

* Make tests pass

* Put into function

* Add changelog

* Fix lint

* RegisterTxService in server

* Remove comment

* Update proto/cosmos/tx/v1beta1/service.proto

Co-authored-by: Cory <cjlevinson@gmail.com>

* Create new protoCdc

* Move tx service to x/auth

* Small tweaks

* Link gh issue

* Fix lint

* Update x/auth/tx/service.go

Co-authored-by: Aleksandr Bezobchuk <alexanderbez@users.noreply.github.com>

Co-authored-by: Cory <cjlevinson@gmail.com>
Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: Aleksandr Bezobchuk <alexanderbez@users.noreply.github.com>
Co-authored-by: SaReN <sahithnarahari@gmail.com>

baseapp/grpcrouter.go

@@ -10,7 +10,6 @@ import (
 	"google.golang.org/grpc/encoding/proto"
 
 	"github.com/cosmos/cosmos-sdk/client/grpc/reflection"
-	"github.com/cosmos/cosmos-sdk/client/grpc/simulate"
 	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
@@ -128,14 +127,3 @@ func (qrt *GRPCQueryRouter) SetInterfaceRegistry(interfaceRegistry codectypes.In
 		reflection.NewReflectionServiceServer(interfaceRegistry),
 	)
 }
-
-// RegisterSimulateService registers the simulate service on the gRPC router.
-func (qrt *GRPCQueryRouter) RegisterSimulateService(
-	simulateFn simulate.BaseAppSimulateFn,
-	interfaceRegistry codectypes.InterfaceRegistry,
-) {
-	simulate.RegisterSimulateServiceServer(
-		qrt,
-		simulate.NewSimulateServer(simulateFn, interfaceRegistry),
-	)
-}