build-commit-from: Support --extra-collection-id

If this is passed, we add an extra collection id binding to
the commit, as well as create a separate ref for that particular
collection id.

This weakly depends on:
  https://github.com/ostreedev/ostree/pull/1805
In that without that change ostree pull will not respect
multiple collection-id bindings. It will still work for
the main/first collection id though.

Closes: #2634
Approved by: alexlarsson
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f