[utils] traverse_obj: Allow unbranching using all and any (#9571)

Authored by: Grub4K

yt_dlp/utils/traversal.py

@@ -228,6 +228,15 @@ def traverse_obj(
             if not casesense and isinstance(key, str):
                 key = key.casefold()
 
+            if key in (any, all):
+                has_branched = False
+                filtered_objs = (obj for obj in objs if obj not in (None, {}))
+                if key is any:
+                    objs = (next(filtered_objs, None),)
+                else:
+                    objs = (list(filtered_objs),)
+                continue
+
             if __debug__ and callable(key):
                 # Verify function signature
                 inspect.signature(key).bind(None, None)