Automatic merge from submit-queue (batch tested with PRs 37325, 38313, 38141, 38321, 38333)

Cleanup firewalls, add nginx ingress to presubmit

Make the firewall cleanup code follow the same pattern as the other cleanup functions, and add the nginx ingress e2e to presubmit. 

Planning to watch the test for a bit, and if it works alright, I'll add the other Ingress e2e to post-submit merge blocker.