Rebased patch after 06e94ec (Fix missed checks for hashability of
container-type equality): the new `scalararray_mcv_hash_match()` now
calls `get_op_hash_functions_ext()` instead of
`get_op_hash_functions()`, passing `nominal_element_type` as the input
type so that container-type operators are correctly rejected when their
element type is not hashable.
--
Best regards,
Ilia Evdokimov,
Tantor Labs LLC,
https://tantorlabs.com/
