Change _cb_ to _callback_ to align with documentation. This is so that
stack traces and error messages align with the documentation. If the
documentation says "callback", then the stack traces and error messages
should indicate that "callback" needs to be function or whatever, rather
than "cb".
PR-URL: https://github.com/nodejs/node/pull/35054
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Michaël Zasso <targos@protonmail.com>