[wip] Attempt to eradicate confounding of release and submission

[j23414]

Description of proposed changes

Draft of an attempt to eradicate confounding of "release" and "submission". Inspired by comment:

• https://github.com/nextstrain/dengue/pull/13#discussion_r1373356935

Still need to trace through phylogenetic rules and scripts

• https://github.com/search?q=repo%3Anextstrain%2Fmonkeypox+date_submitted&type=code

Related issue(s)

• https://github.com/nextstrain/dengue/pull/13#discussion_r1373356935

Checklist

• [ ] Checks pass