Add manual installation of psycopg2 for cicd

Author: kheal

.gitlab-ci.yml

@@ -35,6 +35,7 @@ test-source:
     - python3 -m pip install --upgrade pip
     - python3 -m pip install -r requirements.txt
     - python3 -m pip install pytest pytest-cov
+    - python3 -m pip install psycopg2
     - python3 -c "import pathlib; [p.unlink() for p in pathlib.Path('.').rglob('tests/win_only/__init__.py')]"
     - export PYTHONNET_RUNTIME=coreclr
     - pytest --cache-clear