Obtain CNG Builds for every commit to `gitlab-org/gitlab` stable branches
In order to have our environments constantly deployed to from stable branches, our release environments will actually need the CNG images containing the code built from what's currently in each stable branch.
This means that every time an MR is merged to a stable branch, the pipeline in gitlab-org/gitlab
for that stable branch must interface with one of the CNG mirrors in order to build and obtain images containing the contents of that stable branch.
This is similar to the process we currently have, where we build CNG images on stable branches when we tag something on the stable branch, but instead now we are shifting from just building when tagged, to building on every commit.
Edited by Graeme Gillies