Add option to use new interpolator in pyuvdata

[tyler-a-cox]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.06%. Comparing base (6e1be35) to head (04fd317).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #25      +/-   ##
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- Coverage   93.12%   92.06%   -1.06%     
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  Files           4        4              
  Lines         189      189              
  Branches       44       44              
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- Hits          176      174       -2     
- Misses          7        8       +1     
- Partials        6        7       +1     

Flag	Coverage Δ
unittests	92.06% <ø> (-1.06%)	⬇️

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[steven-murray]

Looks good to me. I'd probably change the default to az_za_map_coordinates though. We'll probably change that to be default on pyuvdata at some point, and there's not a precedent you have to think about here.