deps: upgrade libuv to 1.20.0

Notable changes:
- uv_fs_copyfile() adds support for copy-on-write behavior.
- uv_relative_path() now uses the long directory name
  for handle->dirw.
- File operations on files > 2 GB on 32-bit platforms are
  working again.
- uv_fs_fchmod() on Windows works on files with the
  Archive flag cleared.

Backport-PR-URL: https://github.com/nodejs/node/pull/24103
Fixes: https://github.com/nodejs/node/issues/19170
Fixes: https://github.com/nodejs/node/issues/19455
Fixes: https://github.com/nodejs/node/issues/12803
PR-URL: https://github.com/nodejs/node/pull/19758


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>