crypto: enable auto cert chaining for BoringSSL

OpenSSL enables this feature by default, but BoringSSL doesn't. This
change makes it so that when building node with BoringSSL, the
behaviour matches OpenSSL's.

PR-URL: https://github.com/nodejs/node/pull/22110


Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>