Bug#1104671: python3-zarr: fails on big-endian archs, causing xarray to break

[Julian Gilbey]

Package: python3-zarr
Version: 3.0.6-1
Severity: serious
X-Debbugs-Cc: Antonio Valentino <antonio.valentino at tiscali.it>

The python-xarray autopkgtest is failing on s390x, because the arch is
big-endian and so the lookup for the dtype in from_numpy fails;
zarr/core/metadata/v3.py only lists in dtype_to_data_type, for
example, "<i8" and not ">i8".

I think the solution to this is simply to add the equivalent
big-endian dtypes to this dict.

I'll do a team upload with this change later today, as this is causing
a lot of potential autorms.

Best wishes,

   Julian