Run coverage on 2-hour scheduled pipelines only
What does this MR do?
Coverage isn't accurate in some cases where unit/integration/migration tests don't run, so we disable it entirely for MR and master
push pipelines.
This implements what is suggested at https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/557#note_367304244.
Closes https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/557.
Edited by 🤖 GitLab Bot 🤖