Custom branding: Correctly override bouncing loader (#115871)

use the custom branding logo for the bouncing loader

public/app/core/components/BouncingLoader/BouncingLoader.tsx

@@ -3,7 +3,8 @@ import { css, keyframes } from '@emotion/css';
 import { GrafanaTheme2 } from '@grafana/data';
 import { t } from '@grafana/i18n';
 import { useStyles2 } from '@grafana/ui';
-import grafanaIconSvg from 'img/grafana_icon.svg';
+
+import { Branding } from '../Branding/Branding';
 
 export function BouncingLoader() {
   const styles = useStyles2(getStyles);
@@ -16,7 +17,7 @@ export function BouncingLoader() {
       aria-label={t('bouncing-loader.label', 'Loading')}
     >
       <div className={styles.bounce}>
-        <img alt="" src={grafanaIconSvg} className={styles.logo} />
+        <Branding.LoginLogo className={styles.logo} />
       </div>
     </div>
   );