Slurmformspawner

* Fix issues from previously release with setup.py

What's Changed
* Add ability to select partition by JacobJanzen in https://github.com/cmd-ntrf/slurmformspawner/pull/17
* Change release workflow to use OpenID Connect token and pypa/gh-action-pypi-publish

New Contributors
* JacobJanzen made their first contribution in https://github.com/cmd-ntrf/slurmformspawner/pull/17

Fix issue with total memory available when MemSpecLimit is configured.

Fix account form in various scenarios:
- no account exists
- no account has been processed

Improve get_accounts

Fix issue with account lock