Remove more warnings encountered during tests

[djhoese]

More PROJ and invalid value warnings that are raised during testing

• Closes #xxxx
• Tests added
• Tests passed
• Passes git diff origin/main **/*py | flake8 --diff
• Fully documented

[djhoese]

This PR gets us from 677 warnings to 253 warnings. Quite the improvement. Here's the breakdown pytest tells me of the remaining ones:

pyresample/test/test_area_config.py: 4 warnings
pyresample/test/test_bilinear.py: 27 warnings
pyresample/test/test_bucket.py: 20 warnings
pyresample/test/test_data_reduce.py: 2 warnings
pyresample/test/test_ewa_ll2cr.py: 1 warning
pyresample/test/test_geometry_legacy.py: 10 warnings
pyresample/test/test_grid.py: 9 warnings
pyresample/test/test_image.py: 15 warnings
pyresample/test/test_utils.py: 27 warnings
pyresample/test/test_geometry/test_area.py: 2 warnings
pyresample/test/test_geometry/test_swath.py: 4 warnings

[codecov]

Codecov Report

Merging #513 (ed0efa2) into main (327cec1) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #513   +/-   ##
=======================================
  Coverage   94.31%   94.32%           
=======================================
  Files          79       79           
  Lines       12936    12944    +8     
=======================================
+ Hits        12201    12209    +8     
  Misses        735      735           

Flag	Coverage Δ
unittests	94.32% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pyresample/geometry.py	87.50% <100.00%> (+<0.01%)	⬆️
pyresample/gradient/__init__.py	95.16% <100.00%> (ø)
pyresample/test/test_dask_ewa.py	98.94% <100.00%> (-0.01%)	⬇️
pyresample/test/test_geometry/test_swath.py	100.00% <100.00%> (ø)
pyresample/test/test_gradient.py	99.00% <100.00%> (+0.01%)	⬆️

[coveralls]

Coverage: 93.846% (+0.004%) from 93.843% when pulling ed0efa2 on djhoese:remove-warnings2 into 327cec1 on pytroll:main.