Use local python3 on self-hosted MATLAB parity runner

Author: iahncajigas

.github/workflows/matlab-parity-gate.yml

@@ -39,30 +39,30 @@ jobs:
       - name: Pull LFS Objects
         run: git lfs pull
 
-      - name: Setup Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: "3.11"
+      - name: Show Python runtime
+        run: |
+          python3 --version
+          python3 -m pip --version
 
       - name: Install package and dev dependencies
         run: |
-          python -m pip install --upgrade pip
-          python -m pip install -e ./python[dev]
+          python3 -m pip install --upgrade pip
+          python3 -m pip install -e ./python[dev]
 
       - name: Generate docs/notebooks/parity prerequisites
         run: |
-          python python/tools/generate_help_topic_docs.py
-          python python/tools/generate_example_notebooks.py
-          python python/tools/generate_method_parity_matrix.py
-          python python/tools/generate_implemented_method_coverage.py
+          python3 python/tools/generate_help_topic_docs.py
+          python3 python/tools/generate_example_notebooks.py
+          python3 python/tools/generate_method_parity_matrix.py
+          python3 python/tools/generate_implemented_method_coverage.py
 
       - name: Run MATLAB/Python similarity gate
         run: |
-          python python/tools/verify_python_vs_matlab_similarity.py --enforce-gate
+          python3 python/tools/verify_python_vs_matlab_similarity.py --enforce-gate
 
       - name: Freeze similarity baseline
         run: |
-          python python/tools/freeze_similarity_baseline.py
+          python3 python/tools/freeze_similarity_baseline.py
 
       - name: Upload parity reports
         uses: actions/upload-artifact@v4