fix: generalise permission check for query user information (#8458)

# Which Problems Are Solved

IDPLinks list and other list endpoints can provide you with empty
results if the used user has no permission for the information.

# How the Problems Are Solved

List endpoints with subelements to users, and provided userIDQuery, will
return a PermissionDenied error if no permission for the user exsists.

# Additional Changes

Function to check for permission is re-used from the GetUserByID.

# Additional Context

Closes #8451

internal/api/grpc/admin/export.go

@@ -468,7 +468,7 @@ func (s *Server) getUserLinks(ctx context.Context, orgID string) (_ []*idp_pb.ID
 	if err != nil {
 		return nil, err
 	}
-	idpUserLinks, err := s.query.IDPUserLinks(ctx, &query.IDPUserLinksSearchQuery{Queries: []query.SearchQuery{userLinksResourceOwner}}, false)
+	idpUserLinks, err := s.query.IDPUserLinks(ctx, &query.IDPUserLinksSearchQuery{Queries: []query.SearchQuery{userLinksResourceOwner}}, nil)
 	if err != nil {
 		return nil, err
 	}

internal/api/grpc/admin/idp.go

@@ -112,7 +112,7 @@ func (s *Server) RemoveIDP(ctx context.Context, req *admin_pb.RemoveIDPRequest)
 	}
 	userLinks, err := s.query.IDPUserLinks(ctx, &query.IDPUserLinksSearchQuery{
 		Queries: []query.SearchQuery{idpQuery},
-	}, true)
+	}, nil)
 	if err != nil {
 		return nil, err
 	}