[PM-8997] Revert restriction for provider users (#4223)

* reverted restriction for provider users

* updated comment

src/Api/Vault/Controllers/CiphersController.cs

@@ -380,10 +380,10 @@ public class CiphersController : Controller
             return true;
         }
 
-        // Provider users can only access all ciphers if RestrictProviderAccess is disabled
+        // Provider users can access all ciphers.
         if (await _currentContext.ProviderUserForOrgAsync(organizationId))
         {
-            return !_featureService.IsEnabled(FeatureFlagKeys.RestrictProviderAccess);
+            return true;
         }
 
         return false;