voctocore test suite fails when run on python 3.9, 3.10, and 3.11

[eevelweezel]

At a minimum, the tests should be updated to use unittest.mock vs. standalone mock. However, even after that update, the tests still fail with the following error, even on a machine where voctomix is running:

`======================================================================
ERROR: tests.commands.test_get_config_option (unittest.loader._FailedTest.tests.commands.test_get_config_option)

ImportError: Failed to import test module: tests.commands.test_get_config_option
Traceback (most recent call last):
File "/usr/lib/python3.11/unittest/loader.py", line 407, in _find_test_path
module = self._get_module_from_name(name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/unittest/loader.py", line 350, in _get_module_from_name
import(name)
File "/home/eevel/voctomix/voctocore/tests/commands/test_get_config_option.py", line 2, in
from lib.config import Config
File "/home/eevel/voctomix/voctocore/lib/config.py", line 14, in
from vocto.config import VocConfigParser
File "/home/eevel/voctomix/vocto/init.py", line 3, in
gi.require_version('Gst', '1.0')
^^^^^^^^^^^^^^^^^^
AttributeError: module 'gi' has no attribute 'require_version'
`
Tested on Debian Bookworm (1 from minimal install, 2nd built with Debian Videoteam workflow) with python 3.9, 3.10, and 3.11.