Advertise FFDHE groups also with TLS 1.2-only

Advertise FFDHE groups also with TLS 1.2-only

When the TLS max version is TLS 1.2, include supported RFC7919 FFDHE
groups in the supported_groups extension, provided we support at least
one DHE key exchange ciphersuite.

Also skip the EC point formats extension when the minimum (D)TLS version
is greater than 1.2.  That extension is obsolete as of (D)TLS 1.3.

Finally, folded some extant long lines from the previous RFC7919 commits.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Saša Nedvědický <sashan@openssl.org>
MergeDate: Thu Feb  5 09:09:43 2026
(Merged from https://github.com/openssl/openssl/pull/24551)