[ADF-3593] remove rxjs-compat layer (#3886)

* remove rxjs-compat layer

* add rxjs linter

* observable new instead of create

* lint fixes

* disable rxjs-no-subject-value for certain scenarios

* fix auth rxjs

lib/content-services/mock/document-list.service.mock.ts

@@ -42,14 +42,14 @@ export class DocumentListServiceMock extends DocumentListService {
         if (this.getFolderReject) {
             return throwError(this.getFolderRejectError);
         }
-        return Observable.create(observer => {
+        return new Observable(observer => {
             observer.next(this.getFolderResult);
             observer.complete();
         });
     }
 
     deleteNode(nodeId: string) {
-        return Observable.create(observer => {
+        return new Observable(observer => {
             observer.next();
             observer.complete();
         });