gh-129640: Fix reference cycle in gzip.GzipFile

Author: Mr-Sunglasses

Lib/gzip.py

@@ -143,6 +143,9 @@ def seekable(self):
     def writable(self):
         return True
 
+    def __del__(self):
+        del self.gzip_file
+
 
 class GzipFile(_compression.BaseStream):
     """The GzipFile class simulates most of the methods of a file object with