test against Astropy dev build and use nightly Scipy wheel index

[zacharyburnett]

Resolves SCSB-69

Partially reverts #249

This PR addresses @WilliamJamieson's comments in spacetelescope/romancal#695 (comment); numpy and scipy wheels are hosted at a different index URL. Additionally, adds Astropy's main branch to the dev dependencies, and installs them after the project

Checklist

• Schema changes discussed at RAD Review Board meeting
• Added entry in CHANGES.rst under the corresponding subsection
• Updated relevant roman_datamodels utilities and tests
• Passed romancal regression testing on Jenkins / PLWishMaster. Link: https://plwishmaster.stsci.edu:8081/job/RT/job/romancal/XXX/

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (962893f) 93.54% compared to head (662a475) 93.54%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #252   +/-   ##
=======================================
  Coverage   93.54%   93.54%           
=======================================
  Files           4        4           
  Lines         124      124           
=======================================
  Hits          116      116           
  Misses          8        8           

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[zacharyburnett]

GitHub Actions are currently degraded; running tox -e test-devdeps-xdist locally results in the following pip freeze:

asdf==2.15.0
asdf-astropy==0.4.0
asdf-coordinates-schemas==0.2.0
asdf-standard==1.0.3
asdf-transform-schemas==0.3.0
asdf-unit-schemas==0.1.0
astropy @ git+https://github.com/astropy/astropy.git@f2fbb112983e953fb772c5ac81ec50dfa34bcc19
attrs==23.1.0
execnet==1.9.0
importlib-metadata==6.6.0
iniconfig==2.0.0
jmespath==1.0.1
jsonschema==4.17.3
numpy==1.25.0.dev0+1357.ga2d21d8ac
packaging==23.1
pluggy==1.0.0
pyerfa==2.0.0.3
pyrsistent==0.19.3
pytest==7.3.1
pytest-doctestplus==0.12.1
pytest-xdist==3.2.1
PyYAML==6.0
rad @ file:///Users/zburnett/projects/rad/.tox/.tmp/package/4/rad-0.14.3.dev12%2Bg944ccb0.tar.gz#sha256=fb0f2f0700116b88dfd29ff866c012f6d5fd37341ec1274408bf8c248777a31e
semantic-version==2.10.0
zipp==3.15.0

[ddavis-stsci]

LGTM