feat: EIP191 sign mode (#11533)

## Description

Adds [EIP-191](https://eips.ethereum.org/EIPS/eip-191) as a supported sign mode.

Ref: #10553 (comment)

---

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(cherry picked from commit dc66ddd)

# Conflicts:
#	CHANGELOG.md
#	api/cosmos/distribution/v1beta1/tx.pulsar.go
#	api/cosmos/tx/signing/v1beta1/signing.pulsar.go
#	client/cmd.go
#	client/flags/flags.go
#	client/tx/factory.go
#	go.sum
#	types/tx/signing/signing.pb.go
#	x/distribution/types/tx.pb.go

CHANGELOG.md

@@ -39,6 +39,11 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Features
 
+<<<<<<< HEAD
+=======
+* (tx) [#\11533](https://github.com/cosmos/cosmos-sdk/pull/11533) Register [`EIP191`](https://eips.ethereum.org/EIPS/eip-191) as an available `SignMode` for chains to use.
+* (x/genutil) [\#11500](https://github.com/cosmos/cosmos-sdk/pull/11500) Fix GenTx validation and adjust error messages
+>>>>>>> dc66ddd28 (feat: EIP191 sign mode (#11533))
 * [\#11430](https://github.com/cosmos/cosmos-sdk/pull/11430) Introduce a new `grpc-only` flag, such that when enabled, will start the node in a query-only mode. Note, gRPC MUST be enabled with this flag.
 * (x/bank) [\#11417](https://github.com/cosmos/cosmos-sdk/pull/11417) Introduce a new `SpendableBalances` gRPC query that retrieves an account's total (paginated) spendable balances.
 * (x/bank) [\#10771](https://github.com/cosmos/cosmos-sdk/pull/10771) Add safety check on bank module perms to allow module-specific mint restrictions (e.g. only minting a certain denom).