Plugin extensions: Introduce new registry for added components (#91877)

* add added component registry

* fix broken test

* add tests for usePluginComponents hook

* readd expose components

* add type assertion exceptions to betterer results

* use new addedComponent registry in legacy endpoints

* remove unused code

* cleanup

* revert test code

* remove commented code

* wrap in try catch

* pr feedback

packages/grafana-runtime/src/services/pluginExtensions/getPluginExtensions.ts

@@ -16,6 +16,11 @@ export type GetPluginExtensionsOptions = {
   limitPerPlugin?: number;
 };
 
+export type UsePluginComponentOptions = {
+  extensionPointId: string;
+  limitPerPlugin?: number;
+};
+
 export type GetPluginExtensionsResult<T = PluginExtension> = {
   extensions: T[];
 };
@@ -30,6 +35,11 @@ export type UsePluginComponentResult<Props = {}> = {
   isLoading: boolean;
 };
 
+export type UsePluginComponentsResult<Props = {}> = {
+  components: Array<React.ComponentType<Props>>;
+  isLoading: boolean;
+};
+
 let singleton: GetPluginExtensions | undefined;
 
 export function setPluginExtensionGetter(instance: GetPluginExtensions): void {