feat!: implement delete operator

BREAKING CHANGE!: local motion now means local materialization
of results on the storage without bucket calculation. The old
logic of "do nothing" was moved into none motion.

Implement delete SQL operator. It is always executed locally as we
delete already existing tuples and never change tuple buckets.
We reinvent the logic of the local motion policy (see the desclamer
in this commit) and materialize the primary keys from projection on
the storage. Then they are removed from the space via space API in
a single local transaction.