[Feature] Add graphman unlink

[SozinM]

Complete part of https://github.com/graphprotocol/graph-node/issues/4947

• [x] Implement unlink command
• [ ] Add auditing
• [ ] Add auditing table creation

Introducing the private function subgraphs_info_by_deployment_hash is done to keep the complex query in a single place and add another function (subgraph_ids_by_deployment_hash) to get different fields. I didn't want to change the interface and logic of subgraphs_by_deployment_hash because it is used in other places and will cause cascade refactoring.

[azf20]

Hey @SozinM thanks so much for picking this up! Are you still working on this PR?

[SozinM]

Hi @azf20 Yes, I'll speed up :)

[SozinM]

@lutter Could you provide concrete fields for the auditing table? I cannot find any mention of it anywhere. Or we could add auditing in another PR.

[github-actions[bot]]

This pull request hasn't had any activity for the last 90 days. If there's no more activity over the course of the next 14 days, it will automatically be closed.

[mangas]

@SozinM I will close this PR for the moment as it seems to be stale, feel free to re-open it later.