feat: update librarian.yaml for Node

[jskeet]

This introduces a new Node strategy specifically for https://github.com/googleapis/google-cloud-node, with an updater which is aware of the expected Librarian format for Node.

Once Librarian has moved off release-please, the strategy and updater can be removed.

Towards googleapis/librarian#5461

[jskeet]

(This was largely copied from #2750...)

[chingor13]

Does this need to be a new strategy? If the librarian.yaml file doesn't exist on other yoshi-node repos, then it's a no-op.

Can we add it to the existing strategy?

[chingor13]

Does this need to be a new strategy? If the librarian.yaml file doesn't exist on other yoshi-node repos, then it's a no-op.

Can we add it to the existing strategy?

Oh, I see, there is no yoshi-node strategy -- only the default node one.

[chingor13]

You'll need to add to the factory so that it can build the strategy you've written. https://github.com/googleapis/release-please/blob/main/src/factory.ts

[jskeet]

Yup - no Yoshi one, and you never know whether another Node repo may have a librarian.yaml file of an entirely different nature. Also, once google-cloud-node moves off release-please, it would be good to just revert this change :)

All that said, I have little experience with release-please, so I'm happy to go in whatever direction you suggest.

[jskeet]

You'll need to add to the factory so that it can build the strategy you've written. https://github.com/googleapis/release-please/blob/main/src/factory.ts

Thanks, will do that on Monday.