tls: provide now value from C++

Instead of separately calling into C++ from JS to retrieve
the Timer.now() value, pass it in as an argument.

PR-URL: https://github.com/nodejs/node/pull/18562


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>