Fix the bug by hiding the add button (#17744)

bitwarden_license/bit-web/src/app/admin-console/providers/clients/manage-clients.component.html

@@ -2,6 +2,7 @@
 @let provider = provider$ | async;
 <app-header [title]="pageTitle">
   <bit-search [placeholder]="'search' | i18n" [formControl]="searchControl"></bit-search>
+  @if (provider?.type === ProviderUserType.ProviderAdmin) {
     <button
       bitButton
       buttonType="primary"
@@ -14,6 +15,7 @@
       <i class="bwi bwi-plus bwi-fw" aria-hidden="true"></i>
       {{ "add" | i18n }}
     </button>
+  }
   <bit-menu #clientMenu>
     <button
       type="button"