doc: add documentation deprecation for process._tickCallback

This change also supports --pending-deprecation for the new deprecation.

PR-URL: https://github.com/nodejs/node/pull/29781


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>