Uploading a trial or dev release with no existing permissions or releases should grant permissions

[haarg]

When a dev release is done in an unused namespace, the user should be given first-come permissions just like they would be if they did a real release. This would give proper permission protections on a namespace for modules that haven't had a stable release yet.

This would be particularly useful for downstream users like MetaCPAN. Currently, unauthorized releases are shown in many places because there are situations like "dev release with no stable" where we wouldn't want to hide them entirely.

[neilb]

Referencing #371