Restore lost clazy version printout, and only install clazy for the c…

…lazy runner

.github/workflows/build-checks.yml

@@ -27,10 +27,12 @@ jobs:
       - name: Check out repository
         uses: actions/[email protected]
       - name: Add clazy PPA
+        if: matrix.name == 'clazy'
         # Ubuntu2404 comes with v1.11, which is too old for the Qt6.4 shipped with Ubuntu 24.04
         run: |
           sudo add-apt-repository ppa:daschuer/clazy
           sudo apt update
+          clazy --version
       - name: Install build dependencies
         run: tools/debian_buildenv.sh setup
       - name: Create build directory