* specify the version targeted by the pull request. The end-to-end
tests previously compiled all known branches which was a waste. The
pull request now must specify which version it is targeting so that
only this version is recompiled and used for testing.
* when building the daily releases, use the release from the
integration organization to ensure the tests are run against the
latest build. Clarify in a comment why the lookup order of
organizations is reversed in this particular case.
Refs: https://code.forgejo.org/forgejo/end-to-end/pulls/239