Install cmake in CI

Fix suggested by Copilot

Author: oalders

.github/workflows/build-and-test.yml

@@ -20,6 +20,11 @@ jobs:
       - uses: actions/checkout@v4
       - name: Allow for file ownership conflicts with Docker and GitHub Actions
         run: git config --global --add safe.directory '*'
+      - name: Install CMake
+        run: apt-get update && apt-get install -y cmake
+
+      - name: Use system CMake for Alien-cmake3
+        run: echo "ALIEN_CMAKE3_SYSTEM=1" >> $GITHUB_ENV
       - name: Run Tests with coverage
         env:
           AUTHOR_TESTING: 1