Currently, the PR can be merged even with failing E2E tests. 

Make the E2E tests pass as a mandatory check for PR merge.

Possible solution: 

1. add the job to the required status checks
   add switch to the job, so it will not run again during a merge queue
2. create a new job that will be added to the required status checks
   the job would check the e2e job in a PR and let PR be merged only if passing