fips: remove redundant RSA encrypt/decrypt KAT

fips: remove redundant RSA encrypt/decrypt KAT

FIPS 140-2 IG D.9 has become FIPS 140-3 D.G (see "Mapping FIPS 140-2
IGs to FIPS 140-3" in the FIPS 140-3 IG).

The requirements w.r.t. RSA KATs have now been relaxed, meaning that
existing full-message RSA signature verification (which is performed
separately) is sufficient to meet KAT requirements for all RSA
usecases (KEM/Encrypt/Decrypt/Sign/Verify).

Dropping this KAT is very useful, because it is large/expensive on
module startup, but also because it enables in the future to block RSA
Encrypt/Decrypt operations with paddings other than OAEP, which are
legacy or deprecated by either current or draft algorithm transition
SP.

Reviewed-by: Paul Dale <ppzgs1@gmail.com>
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25988)