[MM-56399][MM-56397][MM-56456][MM-56269] Various changes for user reporting for admins (#25839)

* [MM-56399] Add user count endpoint for reporting

* [MM-56397] Added search term to user report filter

* Missing translation

* [MM-56456] Rename up/down to prev/next for reporting cursoring

* [MM-56269] Add DeleteAt, MfaActive and AuthService fields to UserReport

* PR feedback

* Fix test

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/app/report.go

@@ -14,10 +14,6 @@ func (a *App) GetUsersForReporting(filter *model.UserReportOptions) ([]*model.Us
 		return nil, appErr
 	}
 
-	return a.getUserReport(filter)
-}
-
-func (a *App) getUserReport(filter *model.UserReportOptions) ([]*model.UserReport, *model.AppError) {
 	userReportQuery, err := a.Srv().Store().User().GetUserReport(filter)
 	if err != nil {
 		return nil, model.NewAppError("GetUsersForReporting", "app.report.get_user_report.store_error", nil, "", http.StatusInternalServerError).Wrap(err)
@@ -30,3 +26,12 @@ func (a *App) getUserReport(filter *model.UserReportOptions) ([]*model.UserRepor
 
 	return userReports, nil
 }
+
+func (a *App) GetUserCountForReport(filter *model.UserReportOptions) (*int64, *model.AppError) {
+	count, err := a.Srv().Store().User().GetUserCountForReport(filter)
+	if err != nil {
+		return nil, model.NewAppError("GetUserCountForReport", "app.report.get_user_count_for_report.store_error", nil, "", http.StatusInternalServerError).Wrap(err)
+	}
+
+	return &count, nil
+}