[MM-61140] Allow plugins to add Support Packet data without UI elements (#28833)

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

server/channels/app/upload.go

@@ -62,7 +62,7 @@ func (a *App) runPluginsHook(c request.CTX, info *model.FileInfo, file io.Reader
 		var rejErr *model.AppError
 		var once sync.Once
 		pluginContext := pluginContext(c)
-		a.ch.RunMultiHook(func(hooks plugin.Hooks) bool {
+		a.ch.RunMultiHook(func(hooks plugin.Hooks, _ *model.Manifest) bool {
 			once.Do(func() {
 				hookHasRunCh <- struct{}{}
 			})