Update clang-format workflow to use pre-built container and remove installation step

.github/workflows/clang-format.yml

@@ -8,6 +8,7 @@ on:
 jobs:
   clang-tools:
     runs-on: ubuntu-latest
+    container: silkeh/clang:latest  # Pre-built container with clang tools
 
     permissions:
       contents: write   # Needed to push changes back
@@ -18,11 +19,6 @@ jobs:
         with:
           ref: ${{ github.head_ref }}  # checkout the PR branch so we can push back
 
-      - name: Install clang tools
-        run: |
-          sudo apt update
-          sudo apt install -y clang-format clang-tidy
-
       - name: Run clang-format and auto-fix
         run: |
           FILES=$(find . -name '*.c' -o -name '*.cpp' -o -name '*.h' -o -name '*.hpp')