chore: adding stop relayer func to e2e suite (#2046)

* adding stop relayer func to e2e suite

* updating with review suggestion

Author: damiannolan

e2e/interchain_accounts_test.go

@@ -313,8 +313,7 @@ func (s *InterchainAccountsTestSuite) TestMsgSubmitTx_SuccessfulBankSend_Incenti
 		})
 
 		t.Run("stop relayer", func(t *testing.T) {
-			err := relayer.StopRelayer(ctx, s.GetRelayerExecReporter())
-			s.Require().NoError(err)
+			s.StopRelayer(ctx, relayer)
 		})
 
 		t.Run("broadcast incentivized MsgSubmitTx", func(t *testing.T) {

e2e/testsuite/testsuite.go

@@ -229,6 +229,12 @@ func (s *E2ETestSuite) StartRelayer(relayer ibc.Relayer) {
 	s.startRelayerFn(relayer)
 }
 
+// StopRelayer stops the given relayer.
+func (s *E2ETestSuite) StopRelayer(ctx context.Context, relayer ibc.Relayer) {
+	err := relayer.StopRelayer(ctx, s.GetRelayerExecReporter())
+	s.Require().NoError(err)
+}
+
 // CreateUserOnChainA creates a user with the given amount of funds on chain A.
 func (s *E2ETestSuite) CreateUserOnChainA(ctx context.Context, amount int64) *ibctest.User {
 	chainA, _ := s.GetChains()