fix sorting of groups for host vars

Fixes #13371

lib/ansible/vars/__init__.py

@@ -234,7 +234,7 @@ class VariableManager:
                 for item in data:
                     all_vars = combine_vars(all_vars, item)
 
-            for group in host.get_groups():
+            for group in sorted(host.get_groups(), key=lambda g: g.depth):
                 if group.name in self._group_vars_files and group.name != 'all':
                     for data in self._group_vars_files[group.name]:
                         data = preprocess_vars(data)
@@ -604,4 +604,3 @@ class VariableManager:
         if host_name not in self._vars_cache:
             self._vars_cache[host_name] = dict()
         self._vars_cache[host_name][varname] = value
-