More dynamic background (dyn_bgd_n_faint) test fixes

[jeanconn]

Description

Update more tests related to the dyn_bgd_n_faint default change from 0 to 2.

These should have all been fixed in #214 and the test process there looks reasonable. Yet the tests were failing when I reran unit tests now and seemed related to the dyn_bgd_n_faint change.
I am puzzled but these additional changes seem benign and get tests to pass.

Interface impacts

Testing

Unit tests

• Mac

(ska3-flight-latest) flame:sparkles jean$ python -c "import proseco; print(proseco.__version__)"
5.15.1.dev6+g23db6ec
(ska3-flight-latest) flame:sparkles jean$ git rev-parse HEAD
36d1b9bf8cf710ea092290d8178d2b1f17eadf4e
(ska3-flight-latest) flame:sparkles jean$ pytest
======================================================================= test session starts =======================================================================
platform darwin -- Python 3.11.8, pytest-8.0.2, pluggy-1.4.0
PyQt5 5.15.9 -- Qt runtime 5.15.8 -- Qt compiled 5.15.8
rootdir: /Users/jean/git
configfile: pytest.ini
plugins: astropy-0.11.0, qt-4.4.0, cov-5.0.0, timeout-2.2.0, remotedata-0.4.1, anyio-4.3.0, filter-subpackage-0.2.0, doctestplus-1.2.1, astropy-header-0.2.2, hypothesis-6.112.0, arraydiff-0.6.1, mock-3.14.0
collected 103 items                                                                                                                                               

sparkles/tests/test_checks.py ............................................................................                                                  [ 73%]
sparkles/tests/test_find_er_catalog.py .....                                                                                                                [ 78%]
sparkles/tests/test_review.py ..................                                                                                                            [ 96%]
sparkles/tests/test_yoshi.py ....                                                                                                                           [100%]

====================================================================== 103 passed in 29.28s

Independent check of unit tests by [REVIEWER NAME]

• [PLATFORM]:

Functional tests

No functional testing.

[jeanconn]

Nah. I think I just had an issue with my local git repo.