src: remove calls to deprecated v8 functions (NumberValue)

Remove all calls to deprecated v8 functions (here:
Value::NumberValue) inside the code (src directory only).

PR-URL: https://github.com/nodejs/node/pull/22094


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>