Merge pull request DSpace#4644 from jlipka/fix/form-control-container-unsubscribe

fix: call parent ngOnDestroy in dynamic form control container

Author: tdonohue

src/app/shared/form/builder/ds-dynamic-form-ui/ds-dynamic-form-control-container.component.ts

@@ -437,6 +437,7 @@ export class DsDynamicFormControlContainerComponent extends DynamicFormControlCo
    * Unsubscribe from all subscriptions
    */
   ngOnDestroy(): void {
+    super.ngOnDestroy();
     this.subs
       .filter((sub) => hasValue(sub))
       .forEach((sub) => sub.unsubscribe());