Revert "fix: show asterisk if required text in validator"

This reverts commit a402de204c.

npm/ng-packs/packages/theme-shared/extensions/src/lib/components/extensible-form/extensible-form-prop.component.ts

@@ -1,4 +1,4 @@
-import { ABP, TrackByService } from '@abp/ng.core';
+import { ABP, AbpValidators, TrackByService } from '@abp/ng.core';
 import {
   ChangeDetectionStrategy,
   ChangeDetectorRef,
@@ -168,5 +168,5 @@ export class ExtensibleFormPropComponent implements OnChanges {
 }
 
 function isRequired(validator: ValidatorFn) {
-  return validator === Validators.required || validator.toString().includes('required');
+  return validator === Validators.required || validator === AbpValidators.required;
 }