Switch to pytest

nose has not seen active development for many years now. With py310, we
can no longer use it due to import errors.

Also update lower contraints

Closes-Bug: #1993531
Change-Id: I215ba0d4654c9c637c3b97953d8659ac80892db8

test/probe/test_sharder.py

@@ -19,7 +19,7 @@ import subprocess
 import unittest
 import uuid
 
-from nose import SkipTest
+from unittest import SkipTest
 import six
 from six.moves.urllib.parse import quote