Set pytest --confcutdir for compat tests

Add --confcutdir=tests/compat to the pytest command in tox.ini for the dlclive compatibility test. This forces pytest to stop config discovery at the tests/compat directory so the compat tests run with their intended configuration and aren't affected by higher-level pytest configs.

Author: C-Achard

tox.ini

@@ -75,7 +75,7 @@ deps =
     git+https://github.com/DeepLabCut/DeepLabCut-live.git@main
 commands =
     python -c "import dlclive, importlib.metadata; print('dlclive:', dlclive.__file__); print('version:', importlib.metadata.version('deeplabcut-live'))"
-    pytest -m dlclive_compat tests/compat/test_dlclive_package_compat.py -q
+    pytest --confcutdir=tests/compat tests/compat/test_dlclive_package_compat.py -q
 
 [gh-actions]
 python =