s390x: Test effect of storage keys on some more instructions

Test correctness of some instructions handled by user space instead of
KVM with regards to storage keys.
Test success and error conditions, including coverage of storage and
fetch protection override.

Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-Id: <20220621143609.753452-3-scgl@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>