[MM-31573] update log levels for the app package (#16629)

* update log levels for the app package

* reflect review comments

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/app.go

@@ -315,7 +315,7 @@ func (a *App) getWarnMetricStatusAndDisplayTextsForId(warnMetricId string, T i18
 				warnMetricDisplayTexts.BotMessageBody = T("api.server.warn_metric.number_of_posts_2M.notification_body")
 			}
 		default:
-			mlog.Error("Invalid metric id", mlog.String("id", warnMetricId))
+			mlog.Debug("Invalid metric id", mlog.String("id", warnMetricId))
 			return nil, nil
 		}
 
@@ -464,7 +464,7 @@ func (a *App) NotifyAndSetWarnMetricAck(warnMetricId string, sender *model.User,
 			//same definition as the active users count metric displayed in the SystemConsole Analytics section
 			registeredUsersCount, cerr := a.Srv().Store.User().Count(model.UserCountOptions{})
 			if cerr != nil {
-				mlog.Error("Error retrieving the number of registered users", mlog.Err(cerr))
+				mlog.Warn("Error retrieving the number of registered users", mlog.Err(cerr))
 			} else {
 				bodyPage.Props["RegisteredUsersHeader"] = T("api.templates.warn_metric_ack.body.registered_users_header")
 				bodyPage.Props["RegisteredUsersValue"] = registeredUsersCount