ci: switch fast jobs back to github (#28959)

* switch jobs to ubuntu-slim

* ubuntu slim almost takes 15 minutes for check requirements so use something faster

.github/workflows/python-lint.yml

@@ -21,7 +21,7 @@ concurrency:
 
 jobs:
   flake8-lint:
-    runs-on: [self-hosted, fast]
+    runs-on: ubuntu-slim
     name: Lint
     steps:
       - name: Check out source repository