Create public API replacement for process.binding('uv')

[addaleax]

process.binding('uv') currently yields some information that I don’t think we expose as public API:

1. uv.errname(), which can be trivially replaced by util.getSystemErrorName(), but also
2. a full list of mapped UV error codes and getErrorMap() to access them in Map form (with their strerror()’ed description)

We could decide to drop the second bit from the API, but I think it’s worth exposing at least a full list of libuv error codes somewhere, and then implement a backwards-compatible replacement for process.binding('uv') in terms of that new API.

[addaleax]

/cc @jasnell

[EladKeyshawn]

@addaleax Hey is this still relevant?

[EladKeyshawn]

I added a suggestion of implementation for this at #38101 I hope I understood the need correctly.

[addaleax]

@EladKeyshawn I think something like that would work here, yes 👍