ci: switch to ubuntu 24.04 for build tests

clang from Ubuntu 22.04 is too old for the current Zephyr, switch to
24.04 for the "stub-build" CI test.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

.github/workflows/build_all.yml

@@ -11,7 +11,7 @@ on: [pull_request, workflow_dispatch, workflow_call]
 jobs:
 
   stub-build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
         # Keep these names short due to questionable Github UI choices