Fix: Enhance panel ID validation in PanelPerformanceMetrics

This commit updates the panel ID validation logic in the PanelPerformanceMetrics component to check for both null and NaN values, ensuring more robust handling of invalid panel IDs.

public/app/features/dashboard-scene/scene/PanelPerformanceMetrics.tsx

@@ -31,7 +31,7 @@ export class PanelPerformanceMetrics extends SceneObjectBase<PanelPerformanceMet
     }
 
     const panelId = getPanelIdForVizPanel(panel);
-    if (!panelId) {
+    if (panelId == null || isNaN(panelId)) {
       return;
     }