Resolve "Investigate why we do have pipelines tagged as detached/latest which look quite similar"

Currently, since two CI pipelines are run for every MR, this results in the merge request specific pipeline always performing all snapshots on Chromatic, ignoring TurboSnap (as chromatic cannot find the ancestor correctly, given the merge request specific pipelines is detached). This way, we make sure snapshots can make use of TurboSnap and we have no unnecessary builds that are run.

Unfortunately, there's not a perfect solution to this (yet), see this issue for more details: gitlab-org/gitlab#332501 (comment 633203947)

Closes #27 (closed)