Replace deprecated openssl methods with their alternative APIs

[guybedford]

We currently use deprecated openssl APIs, we should look into migrating to the non deprecated APIs

          Could you add an issue to update this according to the migration guide? It looks like there's an alternate api that we should use instead.

https://www.openssl.org/docs/man3.0/man7/migration_guide.html

Originally posted by @elliottt in https://github.com/fastly/js-compute-runtime/pull/472#discussion_r1156478803