tests: Enable the sha3 signatures test

Signed-off-by: Jakub Jelen <jjelen@redhat.com>

Author: Jakuje

tests/rpmbuild.at

@@ -3887,7 +3887,6 @@ RPMTEST_CLEANUP
 
 RPMTEST_SETUP_RW([file digests sha3])
 AT_KEYWORDS([build digest])
-RPMTEST_SKIP_IF([test x$PGP = xsequoia])
 RPMTEST_CHECK([[
 runroot rpmbuild -bs --quiet \
 		--define "_source_filedigest_algorithm 12" \