src: deprecate two- and one-argument AtExit()

Using `AtExit()` without an `Environment*` pointer or providing
an argument is almost always a sign of improperly relying on global
state and/or using `AtExit()` as an addon when the addon-targeting
`AddEnvironmentCleanupHook()` would be the better choice.

Deprecate those variants. This also updates the addon docs to
refer to `AddEnvironmentCleanupHook()` rather than `AtExit()`.

PR-URL: https://github.com/nodejs/node/pull/30227


Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>