Update maker_utils so that saved nodes are still returned

[WilliamJamieson]

@stscieisenhamer requested that the maker_utils return the nodes even when they are saving the node to ASDF. This will not effect any current uses as the output will be thrown away, but it will enable one to use the node made by the maker_util and saved to a file without having to open that file.

Checklist

• Added entry in CHANGES.rst under the corresponding subsection
• updated relevant tests
• updated relevant documentation
• Passed romancal regression testing on Jenkins / PLWishMaster. Link: https://plwishmaster.stsci.edu:8081/job/RT/job/Roman-devdeps/326/ (all are passing except the tests noted in JP-3242: Proper Handling of Timing for Final Slope Computation for only 0th Good Group Ramps stcal#173 (comment) due to a recent stcal update)

[stscieisenhamer]

LGTM.

Note: I never completed the jira issue filing. So, nevermind on that.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.30 ⚠️

Comparison is base (c0a084d) 94.47% compared to head (3f5c1d0) 94.17%.

❗ Current head 3f5c1d0 differs from pull request most recent head 674c30c. Consider uploading reports for the commit 674c30c to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #218      +/-   ##
==========================================
- Coverage   94.47%   94.17%   -0.30%     
==========================================
  Files          23       23              
  Lines        1628     1545      -83     
==========================================
- Hits         1538     1455      -83     
  Misses         90       90              

Impacted Files	Coverage Δ
src/roman_datamodels/maker_utils/_base.py	100.00% <100.00%> (ø)
src/roman_datamodels/maker_utils/_datamodels.py	95.77% <100.00%> (-0.80%)	⬇️
src/roman_datamodels/maker_utils/_ref_files.py	95.62% <100.00%> (-1.29%)	⬇️

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[PaulHuwe]

LGTM sweep sweep sweep