Refactor: Replace interp2d with interpn

[lettlini]

This PR replaces all calls to interp2d with interpn.

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[codecov]

Codecov Report

Patch coverage: 21.95% and project coverage change: -0.21 ⚠️

Comparison is base (f4a3e5a) 47.41% compared to head (28eb173) 47.21%.

Additional details and impacted files

@@              Coverage Diff              @@
##           RC_v1.5.0     #279      +/-   ##
=============================================
- Coverage      47.41%   47.21%   -0.21%     
=============================================
  Files             14       14              
  Lines           2708     2728      +20     
=============================================
+ Hits            1284     1288       +4     
- Misses          1424     1440      +16     

Flag	Coverage Δ
unittests	47.21% <21.95%> (-0.21%)	⬇️

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

Impacted Files	Coverage Δ
tobac/utils/general.py	64.51% <21.95%> (-4.52%)	⬇️

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[snilsn]

Looks good overall @lettlini and does improve readability.

I realized that my first comment is a general question, why did you swap the coordinates?

[snilsn]

Approving now after the small fix!

[w-k-jones]

Happy for this to be merged. I think we can ignore the failed codecov test

[freemansw1]

I tested this with a fairly large dataset and got the same answers as with the original. Happy for this to be merged. Thanks, @lettlini .

[freemansw1]

@lettlini are you happy for this to be merged? If so, I'll go ahead and get it in. One step closer to v1.5 release.

[lettlini]

Thanks for the reviews @snilsn @w-k-jones @freemansw1. Happy for this to be merged.