misc,python: Run pre-commit run --all-files

Applies the `pyupgrade` hook to all files in the repo.

Change-Id: I9879c634a65c5fcaa9567c63bc5977ff97d5d3bf

ext/testlib/uid.py

@@ -32,7 +32,7 @@ import itertools
 import testlib.configuration as configuration
 
 
-class UID(object):
+class UID:
     sep = ":"
     type_idx, path_idx = range(2)