[TEST] ci: clang: Use test-runner-v2

Author: stephanosio

.github/workflows/clang.yaml

@@ -16,7 +16,7 @@ jobs:
   clang-build:
     if: github.repository_owner == 'zephyrproject-rtos'
     runs-on:
-      group: zephyr-runner-v2-linux-x64-4xlarge
+      group: test-runner-v2-linux-x64-4xlarge
     container:
       image: ghcr.io/zephyrproject-rtos/ci-repo-cache:v0.27.4.20241026
       options: '--entrypoint /bin/bash'