visibility: Check FIPS operational status for MD+Sign operation.
* src/visibility.c (gcry_pk_hash_sign): Check fips status before calling the operation itself. (gcry_pk_hash_verify): Ditto.
Cherry-picked master commit of:
654d0dfa04993ebe28c0536d42f4bc6d87c28369
- GnuPG-bug-id: T6396
- Signed-off-by: Jakub Jelen <jjelen@redhat.com>