Allow deprecated regridding scheme unstructured_nearest in recipe checks

[schlunma]

Description

Very similar to #2324, I forgot another scheme in #2231 😬

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3f610e7) 94.07% compared to head (bf3e633) 94.07%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2336   +/-   ##
=======================================
  Coverage   94.07%   94.07%           
=======================================
  Files         240      240           
  Lines       13306    13306           
=======================================
  Hits        12517    12517           
  Misses        789      789           

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[valeriupredoi]

nice and easy review, bud 😁 🍺