rmeove ext requirement for yaml inventory plugin

returns to the state before 2.4 made it a requirement
fixes #30855

(cherry picked from commit 82de2e1865)

CHANGELOG.md

@@ -51,6 +51,7 @@ Ansible Changes By Release
 * it is import_playbook .. not import_plays .. docs now reflect this
 * fixed typo and missed include/import conversion in import_tasks docs
 * updated porting docs with note about inventory_dir
+* removed extension requirement for yaml inventory plugin to restore previous behaviour
 
 <sdfasdfsadfsdflkjsdfklj3oiqrua id="2.4"></a>
 

lib/ansible/plugins/inventory/yaml.py

@@ -74,7 +74,7 @@ class InventoryModule(BaseFileInventoryPlugin):
         valid = False
         if super(InventoryModule, self).verify_file(path):
             file_name, ext = os.path.splitext(path)
-            if ext and ext in C.YAML_FILENAME_EXTENSIONS:
+            if not ext or ext in C.YAML_FILENAME_EXTENSIONS:
                 valid = True
         return valid