src: lazily load internalBinding('uv') and build the errmap lazily

This removes the `internalBinding('uv')` call from the normal
bootstrap for now, and avoids building `errmap` by default which
expands to a lot of calls into V8.

PR-URL: https://github.com/nodejs/node/pull/25143


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>