Fix path object convertion to string

For Windows path, there is a difference between `str(p)` &
`p.as_posix()`

changelogs/fragments/83600-fileglob-lookup_Pattern-matching-on-directory-file.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - fileglob lookup - Pattern matching on directory & file (https://github.com/ansible/ansible/pull/83600)

lib/ansible/plugins/lookup/fileglob.py

@@ -91,7 +91,7 @@ class LookupModule(LookupBase):
         for term in terms:
             for path in found_paths:
                 term_results = [
-                    to_text(g.as_posix(), errors="surrogate_or_strict")
+                    to_text(str(g), errors="surrogate_or_strict")
                     for g in path.glob(term)
                     if g.is_file()
                 ]