workflows: Move arm static checks runner

Now we have the build-assets running on the gh-hosted
runners, try the same approach for the static-checks

Signed-off-by: stevenhorsman <steven@uk.ibm.com>

.github/workflows/static-checks-self-hosted.yaml

@@ -26,7 +26,7 @@ jobs:
       fail-fast: false
       matrix:
         instance:
-          - "arm-no-k8s"
+          - "ubuntu-22.04-arm"
           - "s390x"
           - "ppc64le"
     uses: ./.github/workflows/build-checks.yaml