src: remove throws in set/getHiddenValue

These are internal only utility functions, CHECK instead of throw

PR-URL: https://github.com/nodejs/node/pull/16544


Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>