Reduce usage of mlog.Any (#25180)

server/channels/app/post.go

@@ -362,7 +362,7 @@ func (a *App) CreatePost(c request.CTX, post *model.Post, channel *model.Channel
 
 	if len(post.FileIds) > 0 {
 		if err = a.attachFilesToPost(post); err != nil {
-			c.Logger().Warn("Encountered error attaching files to post", mlog.String("post_id", post.Id), mlog.Any("file_ids", post.FileIds), mlog.Err(err))
+			c.Logger().Warn("Encountered error attaching files to post", mlog.String("post_id", post.Id), mlog.Array("file_ids", post.FileIds), mlog.Err(err))
 		}
 
 		if a.Metrics() != nil {