Add centroid_test_data missing file

[dagewa]

Added a file from dials_regression/centroid_test_data, but compressed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.25%. Comparing base (faa9645) to head (e26a0c1).
Report is 10 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #484   +/-   ##
=======================================
  Coverage   56.25%   56.25%           
=======================================
  Files           6        6           
  Lines         368      368           
=======================================
  Hits          207      207           
  Misses        161      161           

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