Make sure we are comparing bytes extensions in inventory plugins (#42475)

* Ensure we are comparing text paths with extensions. Fixes #42118

* Add changelog

changelogs/fragments/inventory_dir_ext_compare_fix.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+- inventory - When using an inventory directory, ensure extension comparison uses text types (https://github.com/ansible/ansible/pull/42475)

lib/ansible/inventory/manager.py

@@ -258,7 +258,7 @@ class InventoryManager(object):
 
                 # initialize and figure out if plugin wants to attempt parsing this file
                 try:
-                    plugin_wants = bool(plugin.verify_file(source))
+                    plugin_wants = bool(plugin.verify_file(to_text(source)))
                 except Exception:
                     plugin_wants = False