[EE] Use dedicated runners for all the CI jobs
EE MR for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/15957.
What does this MR do?
This make sure all the CI jobs uses our dedicated runners.
Are there points in the code the reviewer needs to double check?
I've reorganized a bit some lines/definition for more consistency, nothing too fancy.
What are the relevant issue numbers?
Closes #41139
Edited by Rémy Coutable