Staging capabilities for Jakarta EE Specification Projects
## Summary
As reported in https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/issues/5854, we need to be able to stage artifacts the same way we were able to with https://jakarta.oss.sonatype.org
## Priority
- [x] Urgent
- [ ] High
- [ ] Medium
- [ ] Low
## Severity
- [x] Blocker
- [ ] Major
- [ ] Normal
- [ ] Low
## Impact
We need this for the release of Jakarta EE 12
issue