test(ivy): add global utils to the public_api_guard test (#27008)

This API is part of our public api surface and needs to be monitored by the public_api_guard.

I also had to go back and mark all of the exported functions with @publicApi jsdoc tag.

PR Close #27008

tools/public_api_guard/global_utils.d.ts

@@ -0,0 +1,11 @@
+export declare function getComponent<T = {}>(target: {}): T | null;
+
+export declare function getDirectives(target: {}): Array<{}>;
+
+export declare function getHostComponent<T = {}>(target: {}): T | null;
+
+export declare function getInjector(target: {}): Injector;
+
+export declare function getPlayers(ref: ComponentInstance | DirectiveInstance | HTMLElement): Player[];
+
+export declare function getRootComponents(target: {}): any[];