feat: Validate Msg proto annotations (#13793)

Co-authored-by: Marko <marbar3778@yahoo.com>

proto/cosmos/consensus/v1/tx.proto

@@ -11,6 +11,8 @@ option go_package = "github.com/cosmos/cosmos-sdk/x/consensus/types";
 
 // Msg defines the bank Msg service.
 service Msg {
+  option (cosmos.msg.v1.service) = true;
+
   // UpdateParams defines a governance operation for updating the x/consensus_param module parameters.
   // The authority is defined in the keeper.
   //

proto/cosmos/group/v1/tx.proto

@@ -362,7 +362,7 @@ message MsgVoteResponse {}
 
 // MsgExec is the Msg/Exec request type.
 message MsgExec {
-  option (cosmos.msg.v1.signer) = "signer";
+  option (cosmos.msg.v1.signer) = "executor";
   option (amino.name)           = "cosmos-sdk/group/MsgExec";
 
   // proposal is the unique ID of the proposal.