Move some fields out of the SSL object and into the record layer object

Move some fields out of the SSL object and into the record layer object

Fields such as rrlmethod and rrl are entirely related to the record layer,
and so should be in that object.

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18132)