[Github CI] workaround for broken clang on ubuntu runner until action…

…s/runner-images#8659 get fixed

Signed-off-by: Christian Parpart <[email protected]>

.github/workflows/build.yml

@@ -29,7 +29,7 @@ jobs:
       - uses: editorconfig-checker/action-editorconfig-checker@main
       - run: editorconfig-checker
 
-  ubuntu_2204:
+  ubuntu:
     strategy:
       fail-fast: false
       matrix:
@@ -41,7 +41,7 @@ jobs:
             "clang++-14"
           ]
     name: "Ubuntu 22.04 (${{ matrix.compiler }}, C++${{ matrix.cxx }}, ${{matrix.build_type}})"
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-20.04 # ubuntu-22.04 is a broken image
     outputs:
       id: "${{ matrix.compiler }} (C++${{ matrix.cxx }}, ${{ matrix.build_type }})"
     steps:
@@ -54,11 +54,12 @@ jobs:
       - name: "update APT database"
         run: sudo apt -q update
 
-      - name: Install Compilers
-        run: sudo apt install -y g++-11 clang-14
-
       - name: "Download dependencies"
         run: sudo apt install cmake ninja-build catch2
+      # workaround for broken clang on ubuntu runner until https://github.com/actions/runner-images/issues/8659 get fixed
+      #- uses: mjp41/workaround8649@7929373c0fe5caf844d8115adccef39e3b5362e7
+      - name: Install Compilers
+        run: sudo apt install -y g++-11 clang-14
       - name: "Cmake configure"
         run:  cmake -S . -B build -G Ninja -D BOXED_CPP_TESTS=ON -D ENABLE_TIDY=ON -DPEDANTIC_COMPILER=ON -D CMAKE_CXX_FLAGS="-Wno-unknown-warning-option" -DCMAKE_CXX_COMPILER=${{ matrix.compiler }}  -DCMAKE_CXX_STANDARD=${{ matrix.cxx }} -DCMAKE_BUILD_TYPE=${{matrix.build_type}}
       - name: "build "