revert back to slow runners

Author: m1aw

.github/workflows/e2e.yml

@@ -8,8 +8,7 @@ jobs:
   build-then-e2e:
     if: ${{ github.actor != 'renovate[bot]' && github.actor != 'lgtm-com[bot]' }}
     timeout-minutes: 120
-    runs-on: 
-      labels: ubuntu-latest-8-cores
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix: