Ability to delete a consumer

[superlevure]

Proposed change

I haven't found a way to delete a consumer using the Python SDK, the official documentation shows how to do it in Go using the DeleteConsumer method, but it doesn't seem to exist in nats.py.

Calling sub.unsubscribe() doesn't delete the consumer either.

Use case

My App is creating a one off pull based consumer and it needs to clean it after the work is done. I don't want to use an ephemeral consumer because I want to give it a name, and I need to explicitly control its lifecycle.

Contribution

If the proposal is accepted I'm willing to push a PR.

[superlevure]

Actually my bad, there is a delete_consumer method exposed in JetStreamManager:

nats.py/nats/js/manager.py

Line 226 in fe305ac

async def delete_consumer(self, stream: str, consumer: str) -> bool:

It is not documented in the SDK documentation though: https://nats-io.github.io/nats.py/search.html?q=delete_consumer&check_keywords=yes&area=default#