Gate the pkg.group_installed state test: not all pkg modules have group_install

Refs #35907

tests/integration/states/pkg.py

@@ -597,6 +597,7 @@ class PkgTest(integration.ModuleCase,
             )
 
     @requires_system_grains
+    @requires_salt_modules('pkg.group_install')
     def test_group_installed_handle_missing_package_group(self, grains=None):  # pylint: disable=unused-argument
         '''
         Tests that a CommandExecutionError is caught and the state returns False when