Performance improvements for interpolation with map_coordinates

[astrofrog]

Split out from #447, this is needed to make workers not use up too much memory when using dask.distributed, but doesn't quite work yet as the memmap copying doesn't seem to always work (some tests failing)

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 5 lines in your changes missing coverage. Please review.

Project coverage is 90.90%. Comparing base (dcd497b) to head (4b3d7b8).
Report is 28 commits behind head on main.

Files with missing lines	Patch %	Lines
reproject/array_utils.py	66.66%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #448      +/-   ##
==========================================
- Coverage   91.26%   90.90%   -0.37%     
==========================================
  Files          25       25              
  Lines        1065     1077      +12     
==========================================
+ Hits          972      979       +7     
- Misses         93       98       +5     

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