Fixes for Python 3.12 compatibility:

- Upgrade testtools package
- Use platstdlib instead of stdlib to get the path

pkg/linux/build-functions.sh

@@ -86,7 +86,7 @@ _create_python_virtualenv() {
 
     # Figure out some paths for use when completing the venv
     # Use "python3" here as we want the venv path
-    DIR_PYMODULES_PATH=$(python3 -c "from sysconfig import get_path; print(get_path('stdlib'))")
+    DIR_PYMODULES_PATH=$(python3 -c "from sysconfig import get_path; print(get_path('platstdlib'))")
 
     # Use {SYSTEM_PYTHON_PATH} here as we want the system path
     if [ "$1" == "debian" ]; then

web/regression/requirements.txt

@@ -23,7 +23,7 @@ pbr==5.11.1
 pycodestyle>=2.5.0
 python-mimeparse==1.6.0
 testscenarios==0.5.0
-testtools==2.6.0
+testtools==2.7.1
 traceback2==1.4.0
 selenium==4.10.0
 # Pinned for https://github.com/eventlet/eventlet/issues/805