Patch macOS CI

Address Homebrew and Python issues

.github/workflows/ci-github-actions.yaml

@@ -154,16 +154,22 @@ jobs:
     steps:
       - name: Checkout Action
         uses: actions/checkout@v4
-
-      - name: Set Python Version
-        uses: actions/setup-python@v4
-        with:
-          python-version: "3.10"
-
+
+      - run: brew update
+
+      # github actions overwrites brew's python. Force it to reassert itself, by running in a separate step.
+      # From https://github.com/mesonbuild/meson/blob/master/.github/workflows/macos.yml#L87-L92
+      - name: Install Homebrew Python
+        run: |
+        find /usr/local/bin -lname '*/Library/Frameworks/Python.framework/*' -delete
+        sudo rm -rf /Library/Frameworks/Python.framework/
+        brew install --force python3 && brew unlink python3 && brew unlink python3 && brew link --overwrite python3
+        find /usr/local/Cellar/python* -name EXTERNALLY-MANAGED -print0 | xargs -0 rm -vf
+
       - name: Setup Dependencies
         run: |
           brew install ninja hdf5 fftw boost
-          pip3 install numpy h5py pandas
+          python3 -m pip install numpy h5py pandas
 
       - name: Configure
         run: tests/test_automation/github-actions/ci/run_step.sh configure