SG-39873 Use unittest.mock instead of deprecated mock third party library (shotgunsoftware#53)

* Use unittest.mock instead of deprecated mock third party library

* Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: julien-lang

tests/run_tests.py

@@ -10,6 +10,7 @@
 
 import os
 import sys
+import unittest.mock as mock
 
 __file__ = os.path.abspath(__file__)
 
@@ -21,7 +22,6 @@
 sys.path.insert(0, os.path.join(tests_folder, "venv", "Lib", "site-packages"))
 
 import pytest
-import mock
 
 # We need to patch a couple of things to make pytest and argparse happy.
 # argparse doesn't like it when argv is empty, which is what happens when

tests/test_publisher_hooks.py

@@ -12,8 +12,7 @@
 import contextlib
 import logging
 import pprint
-
-import mock
+import unittest.mock as mock
 
 import sgtk