Make e2e tests run only manual trigger
Make e2e tests run only manual trigger. Currently the CI speed isn't optimized at all so I don't want to hold any MRs back
e2e tests added in https://gitlab.com/gitlab-org/gitter/webapp/merge_requests/1480
Also run for any renovate automatic dependency upgrades, https://gitlab.com/gitlab-org/gitter/webapp/merge_requests/1493
Edited by Eric Eastwood