windows: fix for checking locked system files (#30665)

* fix for checking locked system files

* moved functions to share module util and created tests

* fixed windows-paths test based on win_stat changes

test/integration/targets/win_module_utils/tasks/main.yml

@@ -80,3 +80,11 @@
   win_file:
     path: C:\ansible testing
     state: absent
+
+- name: call module with FileUtil tests
+  file_util_test:
+  register: file_util_test
+
+- assert:
+    that:
+    - file_util_test.data == 'success'