testing: fix usage on TimeoutPacket to use counterparty portID/channel ID on nextSeqRecv query (backport #4319) (#4446)

* testing: fix usage on TimeoutPacket to use counterparty portID/channelID in nextSeqRecv query (#4319)

(cherry picked from commit 00a680c)

# Conflicts:
#	testing/endpoint.go

* fix conflicts

---------

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

Author: mergify[bot]

testing/endpoint.go

@@ -526,8 +526,9 @@ func (endpoint *Endpoint) TimeoutPacket(packet channeltypes.Packet) error {
 		return fmt.Errorf("unsupported order type %s", endpoint.ChannelConfig.Order)
 	}
 
-	proof, proofHeight := endpoint.Counterparty.QueryProof(packetKey)
-	nextSeqRecv, found := endpoint.Counterparty.Chain.App.GetIBCKeeper().ChannelKeeper.GetNextSequenceRecv(endpoint.Counterparty.Chain.GetContext(), endpoint.ChannelConfig.PortID, endpoint.ChannelID)
+	counterparty := endpoint.Counterparty
+	proof, proofHeight := counterparty.QueryProof(packetKey)
+	nextSeqRecv, found := counterparty.Chain.App.GetIBCKeeper().ChannelKeeper.GetNextSequenceRecv(counterparty.Chain.GetContext(), counterparty.ChannelConfig.PortID, counterparty.ChannelID)
 	require.True(endpoint.Chain.T, found)
 
 	timeoutMsg := channeltypes.NewMsgTimeout(