sync profile images (#17375)

support for synchronizing user's profile image for shared channels.

services/remotecluster/sendmsg.go

@@ -82,13 +82,6 @@ func (rcs *Service) sendMsg(task sendMsgTask) {
 
 	// Ensure a panic from the callback does not exit the pool goroutine.
 	defer func() {
-		if r := recover(); r != nil {
-			rcs.server.GetLogger().Log(mlog.LvlRemoteClusterServiceError, "Remote Cluster sendMsg panic",
-				mlog.String("remote", task.rc.DisplayName),
-				mlog.String("msgId", task.msg.Id), mlog.Any("panic", r),
-			)
-		}
-
 		if errResp != nil {
 			response.Err = errResp.Error()
 		}