Nightly release snapshot

Right now the publish of Camel K runtime on snapshot always happen when a new commit is pushed to the `main` or `release` branches. If we make sure to double check any error when we merge, then, we should have a guarantee that the latest changes are in the snapshot. However it would be a nice addition a nightly build that takes care of publishing the latest results as a snapshot, just in case the merged commit fail and we don't get any notification about that failure.

_Originally posted by @squakez in https://github.com/apache/camel-k/issues/3764#issuecomment-1286933075_