Respect the bounding_box in inverse transforms

[nden]

Fixes #496

This is a fix similar in spirit to #497 though it uses methods of modeling.ModelBoundingBox .

[codecov]

Codecov Report

Attention: Patch coverage is 64.47368% with 27 lines in your changes missing coverage. Please review.

Project coverage is 86.80%. Comparing base (eb9d316) to head (cd325e4).
Report is 6 commits behind head on master.

Files	Patch %	Lines
gwcs/tests/conftest.py	30.00%	14 Missing ⚠️
gwcs/wcs.py	77.08%	11 Missing ⚠️
gwcs/api.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #498      +/-   ##
==========================================
- Coverage   87.28%   86.80%   -0.48%     
==========================================
  Files          22       21       -1     
  Lines        3821     3865      +44     
==========================================
+ Hits         3335     3355      +20     
- Misses        486      510      +24     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[nden]

@bmorris3 Do you mind testing this PR with your code?
Since this changes the functionality, there are a number of failures in the jwst pipeline. I'll need to address them before this is merged or make this the non-default behavior.

[nden]

@Cadair Can you take a look at this PR and see if it's OK for sun related code?
Note that enforcing the bounding_box on the inverse transform now works and this can change results. If reproducing the bug is necessary, a parameter should be passed with_bounding_box=False.