[Deprecation RFC] node@10 (a.k.a. node-bootstrap)

[Jelle Licht]

Hi guix,

I've just sent out the v2 series to bump Node.js and friends:
https://issues.guix.gnu.org/74187

In this proposed series of patches, the version of Node.js
(node@10.24.1) we use to bootstrap node-llhttp-bootstrap becomes a
hidden package. As per my reading of the policy w.r.t. 'removing' public
packages, consider this message the start of the 1 month notice period
to speak up and mitigate potential breakage [0].

AFAICS I took care of fixing everything within guix proper, but things
can break in branches other than master, and in external
channels. Please reply with any concerns, and cc 74187@debbugs.gnu.org
for good measure.

Some soft landing options:
1. Define a deprecated-package that aliases the 'node' variable to
'node-lts'. I'd prefer not doing this, as in the medium term it would be
nice to have a proper 'node' package that actually tracks the latest
releases.

2. Add an entry in news.scm.

Kind regards,
- Jelle

[0]: https://xkcd.com/1172/