Adding API capabilities to ProjectPush
What does this MR do?
This MR tries to add API capabilities to the ProjectPush resource. It updates the aforementioned class as well as the MergeRequest resource since this is a use-case for ProjectPush.
Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/12385
Does this MR meet the acceptance criteria?
Conformity
Edited by Tomislav Nikić