feat(ci): add cron schedule to nightly test

caching e2e tests result refactor and testing

n/a

.github/workflows/test-plugins-against-cockpit-nightly.yml

@@ -1,7 +1,7 @@
 name: Test plugins against Cockpit- nightly run
 on:
  schedule:
- - cron: '22 8 * * 1-5'
+ - cron: '29 08 * * 1-5'
 
 permissions:
  contents: read