pin tests to numpy==1.22.3 due to dropped numpy.asscalar used by astropy 5.0.x

[sbailey]

numpy 1.23 dropped numpy.asscalar, which has been deprecated since version 1.16. However, astropy 5.0 still uses numpy.asscalar, and we still use astropy 5.0. It looks like we'll need to pin tests and desiconda to numpy==1.22.3 for now.

It's unclear to me why the desiutil master -> main triggered unit tests that caught this when the other repos didn't, but an example failure is below. Let's implement the github test fix here in desiutil, and then propagate the same to other repos as needed.

py/desiutil/test/test_io.py:11: in <module>
[52](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:53)
    from astropy.table import Table
[53](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:54)
/opt/hostedtoolcache/Python/3.8.13/x64/lib/python3.8/site-packages/astropy/table/__init__.py:41: in <module>
[54](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:55)
    from .column import Column, MaskedColumn, StringTruncateWarning, ColumnInfo
[55](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:56)
/opt/hostedtoolcache/Python/3.8.13/x64/lib/python3.8/site-packages/astropy/table/column.py:13: in <module>
[56](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:57)
    from astropy.units import Unit, Quantity
[57](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:58)
/opt/hostedtoolcache/Python/3.8.13/x64/lib/python3.8/site-packages/astropy/units/__init__.py:17: in <module>
[58](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:59)
    from .quantity import *
[59](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:60)
/opt/hostedtoolcache/Python/3.8.13/x64/lib/python3.8/site-packages/astropy/units/quantity.py:29: in <module>
[60](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:61)
    from .quantity_helper import (converters_and_unit, can_have_arbitrary_unit,
[61](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:62)
/opt/hostedtoolcache/Python/3.8.13/x64/lib/python3.8/site-packages/astropy/units/quantity_helper/__init__.py:10: in <module>
[62](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:63)
    from . import helpers, function_helpers
[63](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:64)
/opt/hostedtoolcache/Python/3.8.13/x64/lib/python3.8/site-packages/astropy/units/quantity_helper/function_helpers.py:127: in <module>
[64](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:65)
    np.asscalar,
[65](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:66)
/opt/hostedtoolcache/Python/3.8.13/x64/lib/python3.8/site-packages/numpy/__init__.py:311: in __getattr__
[66](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:67)
    raise AttributeError("module {!r} has no attribute "
[67](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:68)
E   AttributeError: module 'numpy' has no attribute 'asscalar'
[68](https://github.com/desihub/desiutil/runs/7865042526?check_suite_focus=true#step:5:69)

[weaverba137]

I think in some of the other repos it's either already pinned, or the tests have dependencies that don't bring in that version.

#185 already pins numpy.

[weaverba137]

Fixed in #185.