crypto: support authTagLength in GCM encryption

The authTagLength option can now be used to produce GCM authentication
tags with a specific length.

PR-URL: https://github.com/nodejs/node/pull/20235
Refs: https://github.com/nodejs/node/pull/20039


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yihong Wang <yh.wang@ibm.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>