Access Control: Clear user's permission cache after resource creation (#59101)

* refresh user's permission cache after resource creation

* clear the cache instead of reloading the permissions

* don't error if can't clear cache

* fix tests

* fix tests again

pkg/services/accesscontrol/acimpl/service.go

@@ -147,6 +147,14 @@ func (s *Service) getCachedUserPermissions(ctx context.Context, user *user.Signe
 	return permissions, nil
 }
 
+func (s *Service) ClearUserPermissionCache(user *user.SignedInUser) {
+	key, err := permissionCacheKey(user)
+	if err != nil {
+		return
+	}
+	s.cache.Delete(key)
+}
+
 func (s *Service) DeleteUserPermissions(ctx context.Context, orgID int64, userID int64) error {
 	return s.store.DeleteUserPermissions(ctx, orgID, userID)
 }