feat: lint and tox run before AIO tests

Avoid running more resource intensive tests before linting and
unit tests. As subsequent patches to fix linting and tox issues will
require running AIOs again.

Author: jackhodgkiss

.github/workflows/stackhpc-pull-request.yml

@@ -18,6 +18,9 @@ jobs:
       pull-requests: read
     name: Check changed files
     if: github.repository == 'stackhpc/stackhpc-kayobe-config'
+    needs:
+      - lint
+      - tox
     outputs:
       aio: ${{ steps.changes.outputs.aio }}
       build-kayobe-image: ${{ steps.changes.outputs.build-kayobe-image }}