[utils] Fix race condition in `make_dir` (#6089)

Authored by: aionescu

yt_dlp/cache.py

@@ -39,11 +39,7 @@ class Cache:
 
         fn = self._get_cache_fn(section, key, dtype)
         try:
-            try:
-                os.makedirs(os.path.dirname(fn))
-            except OSError as ose:
-                if ose.errno != errno.EEXIST:
-                    raise
+            os.makedirs(os.path.dirname(fn), exist_ok=True)
             self._ydl.write_debug(f'Saving {section}.{key} to cache')
             write_json_file({'yt-dlp_version': __version__, 'data': data}, fn)
         except Exception:

yt_dlp/utils.py

@@ -5370,8 +5370,8 @@ def random_uuidv4():
 def make_dir(path, to_screen=None):
     try:
         dn = os.path.dirname(path)
-        if dn and not os.path.exists(dn):
-            os.makedirs(dn)
+        if dn:
+            os.makedirs(dn, exist_ok=True)
         return True
     except OSError as err:
         if callable(to_screen) is not None: