sqlccl: fix merge skews
sqlccl: fix merge skews

Stop using RESTORE DATABASE, which has been disallowed for now, and
remove an unnecessary TestDisableTableLeases.

paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach,paperstreet/cockroach