Add support for additional Helm chartmuseum endpoints

Proposal

#18997 (closed) implemented the Helm charts registry MVC, but there are other endpoints available from chartmuseum that may be desired:

1. GET /api/v4/projects/<id>/packages/helm/<channel>/charts/<name>-<version>.tgz.prov
2. POST /api/v4/projects/<id>/packages/helm/api/<channel>/prov
3. DELETE /api/v4/projects/<id>/packages/helm/api/<channel>/charts/<name>/<version> 👍
4. GET /api/v4/projects/<id>/packages/helm/api/<channel>/charts
5. GET /api/v4/projects/<id>/packages/helm/api/<channel>/charts/<name>
6. GET /api/v4/projects/<id>/packages/helm/api/<channel>/charts/<name>/<version>
7. HEAD /api/v4/projects/<id>/packages/helm/api/<channel>/charts/<name>
8. HEAD /api/v4/projects/<id>/packages/helm/api/<channel>/charts/<name>/<version>
9. (GET /api/v4/projects/<id>/packages/helm/?)
10. (GET /api/v4/projects/<id>/packages/helm/info?)
11. (GET /api/v4/projects/<id>/packages/helm/health?)

We should consider implementing some of the most popular endpoints to support more functionality.