Angular: Isolate angular more (#41440)

* Getting close

* Restore angular app boot at startup

* Moving angular annotations dependencies to app/angular or old graph

* Remove redundant setLinkSrv call

* Fixing graph test

* Minor refactor based on review feedback

* Create in get function

public/app/features/all.ts

@@ -1,4 +1,3 @@
-import './annotations/all';
 import './plugins/all';
 import './dashboard';
 import './manage-dashboards';