tests: fix and update tests:

- update code to newer version of `sh`
- update code to newer version of `selenium`
- update names of OMEMO algorithms
- fix paths and names used to mount source to the test container
- skip modules using `Gst` and `PyQt` when they are not available.

tests/unit/cli/test_calls.py

@@ -17,11 +17,14 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 from unittest.mock import MagicMock, patch
 
-from PyQt6.QtWidgets import QApplication
 import pytest
 
-from libervia.cli.call_gui import AVCallUI
-from libervia.frontends.tools import display_servers
+try:
+    from libervia.cli.call_gui import AVCallUI
+    from libervia.frontends.tools import display_servers
+    from PyQt6.QtWidgets import QApplication
+except ModuleNotFoundError:
+    pytest.skip("PyQt6 is not available.", allow_module_level=True)
 
 
 @pytest.fixture(scope="session")