src,crypto: refactoring of crypto_context, SecureContext

Cleaup and improvement of crypto_context and SecureContext.

Signed-off-by: James M Snell <jasnell@gmail.com>

PR-URL: https://github.com/nodejs/node/pull/35665


Reviewed-By: Alba Mendez <me@alba.sh>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>