tls: allow client-side sockets to be half-opened

Make `tls.connect()` support an `allowHalfOpen` option which specifies
whether or not to allow the connection to be half-opened when the
`socket` option is not specified.

PR-URL: https://github.com/nodejs/node/pull/27836


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ouyang Yadong <oyydoibh@gmail.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>