Template parent include path before finding its dirname (#23202)

Given parent include path "{{ var | default('path/file.yml') }}"
os.path.dirname(parent_include_path) yields {{ var | default('path/
which is incorrect in itself but also causes templating errors
due to unbalanced quotes. Fix both problems by templating
parent include path before finding its dirname.

lib/ansible/playbook/helpers.py

@@ -169,7 +169,7 @@ def load_list_of_tasks(ds, play, block=None, role=None, task_include=None, use_h
                         if not isinstance(parent_include, TaskInclude):
                             parent_include = parent_include._parent
                             continue
-                        parent_include_dir = templar.template(os.path.dirname(parent_include.args.get('_raw_params')))
+                        parent_include_dir = os.path.dirname(templar.template(parent_include.args.get('_raw_params')))
                         if cumulative_path is None:
                             cumulative_path = parent_include_dir
                         elif not os.path.isabs(cumulative_path):

lib/ansible/playbook/included_file.py

@@ -101,7 +101,7 @@ class IncludedFile:
                                 if not isinstance(parent_include, TaskInclude):
                                     parent_include = parent_include._parent
                                     continue
-                                parent_include_dir = templar.template(os.path.dirname(parent_include.args.get('_raw_params')))
+                                parent_include_dir = os.path.dirname(templar.template(parent_include.args.get('_raw_params')))
                                 if cumulative_path is None:
                                     cumulative_path = parent_include_dir
                                 elif not os.path.isabs(cumulative_path):