BUG: Relax dtype identity check in reductions

In some cases, e.g. ensure-native-byte-order will return not the
default, but a copy of the descriptor.

This (and maybe metadata) makes it somewhat annoying to ensure
exact identity between descriptors for reduce "operands" as
returned by the resolve-descirptors method of the ArrayMethod.

To avoid this problem, we check for no-casting (which implies
viewable with `offset == 0`) rather than strict identity.

Unfortunately, this means that descriptor resolution must be slightly
more careful, but in general this should all be perfectly well
defined.

Closes gh-20699

0 files changed, 0 insertions, 0 deletions