Restrict angular imports (#5597)

* Refactor restricted imports eslint rule, add angular deps

* Move FormValidationErrorsService into libs/angular

* Remove angular decorators from configService

* Remove angular decorator from anonymousHubService

libs/angular/src/platform/abstractions/form-validation-errors.service.ts

@@ -0,0 +1,13 @@
+import { AbstractControl } from "@angular/forms";
+export interface AllValidationErrors {
+  controlName: string;
+  errorName: string;
+}
+
+export interface FormGroupControls {
+  [key: string]: AbstractControl;
+}
+
+export abstract class FormValidationErrorsService {
+  getFormValidationErrors: (controls: FormGroupControls) => AllValidationErrors[];
+}