Move Snapshot to incubator
Following https://gitlab.gnome.org/Incubator/Submission/-/issues/5 having a positive review from the design team and another from the release team, snapshot should be moved to the incubator namespace.
Following https://gitlab.gnome.org/Incubator/Submission/-/issues/5 having a positive review from the design team and another from the release team, snapshot should be moved to the incubator namespace.