API: use restricted serializer for related projects

[stsewd]

Ref https://github.com/readthedocs/readthedocs-corporate/issues/1845

[stsewd]

I wonder if we should exclude the name from restricted objects as well (restricted organization is the other serializer like this)

[humitos]

I'm confused about what we talked in our meeting and what we are implementing here. I understood we were going in another direction. Can you explain more your thoughts here and what are the next steps based on the context I've shared?

[ericholscher]

This approach seems good to me. I'm not in love with doing a bunch of nested values in API responses, and I think in general folks can re-query the API for the returned project if they need the data.

Not sure if we need a note in the API docs/blog about this, or if we're just guessing folks aren't currently using this data?

[stsewd]

Not sure if we need a note in the API docs/blog about this, or if we're just guessing folks aren't currently using this data?

Putted a note in the docs