Split update step from CI run.

Author: hageboeck

.github/workflows/root-ci.yml

@@ -113,20 +113,20 @@ jobs:
           # - platform: mac14
           #   arch: X64
           #   overrides: ["CMAKE_CXX_STANDARD=20"]
-          - platform: mac15
-            arch: ARM64
-            overrides: ["CMAKE_CXX_STANDARD=23"]
+          #- platform: mac15
+          #  arch: ARM64
+          #  overrides: ["CMAKE_CXX_STANDARD=23"]
           - platform: experimental-brew-ci
             # arch: ARM64
             overrides: ["CMAKE_CXX_STANDARD=23"]
-          - platform: experimental-brew-ci-2
-            # arch: ARM64
-            overrides: ["CMAKE_CXX_STANDARD=23", "tmva-sofie=Off"]
+          #- platform: experimental-brew-ci-2
+          #  # arch: ARM64
+          #  overrides: ["CMAKE_CXX_STANDARD=23", "tmva-sofie=Off"]
           # - platform: mac26
           #   arch: ARM64
-          - platform: mac-beta
-            is_special: true
-            arch: ARM64
+          #- platform: mac-beta
+          #  is_special: true
+          #  arch: ARM64
 
     runs-on: # Using '[self-hosted, ..., ...]' does not work for some reason :)
       - self-hosted
@@ -147,28 +147,6 @@ jobs:
           ref: ${{ inputs.ref_name }}
           path: src/
 
-      - name: Update brew packages
-        if: ${{ contains(matrix.platform, 'experimental-brew-ci') }}
-        run: |
-            brew update
-            brew install ccache googletest openjdk pyenv python3
-            echo "Installing official brew deps: $(brew deps --direct --include-build root)"
-            brew install $(brew deps --direct --include-build root)
-            java --version
-
-      - name: Set up python venv
-        if: ${{ contains(matrix.platform, 'experimental-brew-ci') }}
-        run: |
-          $(brew --prefix python)/bin/python3 -m venv ${VENV_DIR}
-          source ${VENV_DIR}/bin/activate
-          pip install --upgrade pip
-          cat ${{ github.workspace }}/src/requirements.txt | while read PACKAGE; do
-            if [ -n "${PACKAGE%%#*}" ]; then
-              pip install -U "${PACKAGE%%#*}";
-          fi; done || true
-          pip install openstacksdk # TODO: Remove?
-          echo ${VENV_DIR}/bin >> $GITHUB_PATH
-
       - name: Apply option overrides from matrix for this job for non-release builds
         if: ${{ github.event_name != 'schedule' && github.event_name != 'workflow_dispatch' && matrix.overrides != NaN }}
         env:
@@ -181,7 +159,7 @@ jobs:
         with:
           build-directory: /Users/sftnight/ROOT-CI/src/
 
-      - name: Set up curl CA bundle for Davix to work with https
+      - name: Export SSL certificate files for Davix
         run: |
           for cert in /opt/homebrew/opt/ca-certificates/share/ca-certificates/cacert.pem /opt/local/share/curl/curl-ca-bundle.crt; do
             if [ -f ${cert} ]; then