Recorded Queries: Split extension reducers init and extension init (#41850) (#42016)

(cherry picked from commit cc471f2d58)

Co-authored-by: Todd Treece <360020+toddtreece@users.noreply.github.com>

public/app/app.ts

@@ -95,9 +95,10 @@ export class GrafanaApp {
       setPanelRenderer(PanelRenderer);
       setLocationSrv(locationService);
       setTimeZoneResolver(() => config.bootData.user.timezone);
-      // Important that extensions are initialized before store
-      initExtensions();
+      // Important that extension reducers are initialized before store
+      addExtensionReducers();
       configureStore();
+      initExtensions();
 
       standardEditorsRegistry.setInit(getAllOptionEditors);
       standardFieldConfigEditorRegistry.setInit(getStandardFieldConfigs);
@@ -145,6 +146,12 @@ export class GrafanaApp {
   }
 }
 
+function addExtensionReducers() {
+  if (extensionsExports.length > 0) {
+    extensionsExports[0].addExtensionReducers();
+  }
+}
+
 function initExtensions() {
   if (extensionsExports.length > 0) {
     extensionsExports[0].init();