FIPS: Change fips tests to use SHA2 for corruption test.

Fixes cross testing with OpenSSL 3.4 with removed SHA1 from the self
tests.

Reviewed-by: Paul Dale <ppzgs1@gmail.com>
Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25262)

(cherry picked from commit 06179b4b)