[MM-46579] Add a limit for preferences (#21780)

* add a limit for preferences

* add limits to preferences

* add config to telemetry

* remove unneeded tags from config

app/preference.go

@@ -33,7 +33,8 @@ func (w *preferencesServiceWrapper) DeletePreferencesForUser(userID string, pref
 }
 
 func (a *App) GetPreferencesForUser(userID string) (model.Preferences, *model.AppError) {
-	preferences, err := a.Srv().Store().Preference().GetAll(userID)
+	limit := *a.Config().ServiceSettings.ExperimentalMaxUserPreferences
+	preferences, err := a.Srv().Store().Preference().GetAll(userID, limit)
 	if err != nil {
 		return nil, model.NewAppError("GetPreferencesForUser", "app.preference.get_all.app_error", nil, "", http.StatusBadRequest).Wrap(err)
 	}