Drop the session and PSK test from the clienthellotest

Drop the session and PSK test from the clienthellotest

This test doesn't really give us much that the other tests don't already
achieve. Added to that the ClientHello is nearly too long for it to work
reliably. Small changes in the ClientHello length make this test break.
So this test is too brittle with little value - so we drop it.

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/26654)