Updates Gitlab runner documentation
This branch modifies the documentation around Gitlab runners. With the new prefixed publisher runners, we're now able to make runners namespaced to each team that wants to use this feature.
At 10PM on Tuesday, 3/4/25, GitLab will be patched to version 17.8.4: https://outages.doit.wisc.edu/outage/94b93a4e9afac6453b4ca146bbb5a427c6856c676f
This branch modifies the documentation around Gitlab runners. With the new prefixed publisher runners, we're now able to make runners namespaced to each team that wants to use this feature.