Remove Python 3.8 support (#11321)

Closes #10086
Authored by: bashonly

yt_dlp/compat/compat_utils.py

@@ -57,7 +57,7 @@ def passthrough_module(parent, child, allowed_attributes=(..., ), *, callback=la
         callback(attr)
         return ret
 
-    @functools.lru_cache(maxsize=None)
+    @functools.cache
     def from_child(attr):
         nonlocal child
         if attr not in allowed_attributes: