Refactor folder path handling for validation plugin

Improved folder path processing for better accuracy in validation.

client/ayon_core/plugins/publish/validate_editorial_asset_name.py

@@ -35,7 +35,7 @@ class ValidateEditorialAssetName(pyblish.api.ContextPlugin):
 
         existing_folder_paths = {
             folder_entity["path"]: (
-                folder_entity["path"].lstrip("/").rsplit("/")[:-1]
+                folder_entity["path"].lstrip("/").split("/")[:-1]
             )
             for folder_entity in folder_entities
         }