feat: change lint job to run on self-hosted runner

Author: puehringer

.github/workflows/lint.yml

@@ -11,7 +11,7 @@ concurrency:
 
 jobs:
   lint:
-    runs-on: ubuntu-22.04
+    runs-on: ${{ vars.RUNS_ON_OVERRIDE || 'self-hosted' }}
     if: ${{ github.event_name == 'push' }}
     steps:
       - uses: actions/checkout@v5