feat: draft release support

[developer-guy]

I started with the generic builder and will continue with the others as well if you accept the solution:

Fixes #1476

I tried that in osv-scanner project and it worked:

• Job: https://github.com/developer-guy/osv-scanner/actions/runs/4536204956/jobs/7992687991
• Release: https://github.com/developer-guy/osv-scanner/releases/tag/untagged-5bf09e3accd2794d0d10

PTAL @laurentsimon @asraa @ianlewis

[ianlewis]

Thanks! Can you:

• Add draft-release to the Go builder?
• Add draft-release to the docs for the generic generator
• Add draft-release to the docs for the Go builder?
• Add draft-release to the docs for the docker-based builder?
• Add a note to the CHANGELOG.md?

[developer-guy]

ready for review @ianlewis

[ianlewis]

Thanks! Could you add the draft-release input to the docs for the generic generator, docker based builder, and Go builder ?

We should also have a note in the CHANGELOG.md for the v1.6.0 release.

[developer-guy]

• Add draft-release to the docs for the generic generator
• Add draft-release to the docs for the Go builder?
• Add draft-release to the docs for the docker-based builder?
• Add a note to the CHANGELOG.md?

[ianlewis]

Thanks!