Fix mismatched destination pixel map behavior

[delucchi-cmu]

Change Description

Under some conditions, the destination pixel map produced by compute_pixel_map has different destination pixels than that produced by generate_destination_pixel_map, using a pre-defined alignment array. In this situation, the alignment and the pixel map will not agree on the correct pixels.

This manifested in the hipscat-import catalog creation splitting inputs according to the alignment, and trying to reduce them according to the destination pixel map, and not finding the appropriate files.

Bug Fix Checklist

• My fix includes a new test that breaks as a result of the bug (if possible)

[codecov]

Codecov Report

Merging #112 (6796913) into main (293a76d) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #112   +/-   ##
=======================================
  Coverage   99.83%   99.83%           
=======================================
  Files          41       41           
  Lines        1181     1181           
=======================================
  Hits         1179     1179           
  Misses          2        2           

Impacted Files	Coverage Δ
src/hipscat/pixel_math/partition_stats.py	100.00% <100.00%> (ø)

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