In the lifecycle of vX.Y.Z, all tests are run against vX.Y-test
before it is published, including when the tag is pushed because the
automated release process now runs end-to-end before pushing the
release to forgejo-experimental.
Running end-to-end against vX.Y-dev is therefore redundant with at least
two other runs with exactly the same SHA (the one before the tag is
pushed and the one when the tag is pushed). There would be value in
doing that if it allowed to detect race conditions in Forgejo. But
such races were not found in the past six months and there is a lot
more scrutiny on commits merged in Forgejo which makes it even less
likely than it was before.
Running the tests on vX.Y instead of also including the built version
provide the same coverage and reduces the workload.
