[ci] install and use clang-format 20

Author: pcanal

.github/workflows/code_analysis.yml

@@ -37,7 +37,11 @@ jobs:
     - name: Determine merge base
       run: echo "MERGE_BASE=$(git merge-base ${{ github.event.pull_request.base.sha }} HEAD)" >> $GITHUB_ENV
     - name: install clang-format
-      run: sudo apt-get install -y clang-format
+      run: |
+         wget https://apt.llvm.org/llvm.sh
+         chmod u+x ./llvm.sh
+         sudo ./llvm.sh 20
+         sudo apt-get install -y clang-format-20
     - name: run clang-format script
       run: .ci/format_script.sh