test skipp pygemc in codeql and sanitize ci

Author: maureeungaro

.github/workflows/codeql.yml

@@ -95,6 +95,8 @@ jobs:
       # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
       - if: matrix.build-mode == 'manual'
         shell: bash
+        env:
+          GEMC_SKIP_PYTHON_ENV_INSTALL: "1"
         run: |
           echo "Starting manual build for CodeQL..."
 

ci/install_python_env.py

@@ -31,6 +31,4 @@
 venv_python = str(venv_dir / 'bin' / 'python3')
 subprocess.run([venv_python, '-m', 'pip', 'install', '--no-cache-dir', '--upgrade',
                 'pip', 'setuptools', 'wheel'], check=True)
-# --no-build-isolation avoids pip spawning an extra ephemeral build env, reducing memory use.
-subprocess.run([venv_python, '-m', 'pip', 'install', '--no-cache-dir', '--no-build-isolation',
-                pygemc_src], check=True)
+subprocess.run([venv_python, '-m', 'pip', 'install', '--no-cache-dir', pygemc_src], check=True)