crypto: check DiffieHellman p and g params

It's possible to pass in the prime and generator params as buffers
but that mode of input wasn't as rigorously checked as numeric input.

PR-URL: https://github.com/nodejs/node/pull/32739
Fixes: https://github.com/nodejs/node/issues/32738


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Zeyu Yang <himself65@outlook.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>