Flatten namespace packages

[taldcroft]

This is an automatically generated PR to flatten namespace packages.

Testing

• MacOS

(ska3) ➜  acis_taco git:(flatten-namespace-package-names) git rev-parse HEAD       
2491ee11d59a7f0aaa657d0181a86617c3049096
(ska3) ➜  acis_taco git:(flatten-namespace-package-names) pytest
===================================================== test session starts =====================================================
platform darwin -- Python 3.10.8, pytest-7.2.1, pluggy-1.0.0
rootdir: /Users/aldcroft/ska/analysis/sot_repos/acis_taco, configfile: setup.cfg
plugins: timeout-2.1.0, anyio-3.6.2
collected 2 items                                                                                                             

acis_taco/tests/test_illum_regress.py .                                                                                 [ 50%]
acis_taco/tests/test_random_salt.py .                                                                                   [100%]

====================================================== 2 passed in 1.43s ======================================================