enhance additional checksum tests

enhance additional checksum tests

includes tests for CRC64NVME, tests for selecting
COMPOSITE and FULL_OBJECT checksums

a decomposed matrix of tests for all checksum types

also removes the mixed checksum upload case that no longer
works in recent boto3

cleanups, add sha1

checksum validation failure (mismatch) returns BadDigest

multipart checksum matrix helper now validates checksum and checksum type
for all operations which can return them (complete-multipart, head-object,
and get-object-attributes)

Signed-off-by: Matt Benjamin <mbenjamin@redhat.com>