Install LLVM 17 when building with Clang

This addresses compile time issues due to a segfault in Clang 14

.github/workflows/cmake-multi-platform.yml

@@ -56,6 +56,13 @@ jobs:
       run: |
         echo "build-output-dir=${{ github.workspace }}/build" >> "$GITHUB_OUTPUT"
 
+    - name: Install LLVM 17
+      if: ${{ matrix.c_compiler == 'clang-17' }}
+      run: |
+          wget https://apt.llvm.org/llvm.sh
+          chmod +x llvm.sh
+          sudo ./llvm.sh 17
+
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
       # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type