Fix kwargs issue on GPUs

[dennisYatunin]

Purpose

It looks like the fix to #144 applied in #157 did not work in ClimaAtmos (see this build), and several test cases now have a garbage collection instruction that is breaking GPU compilation. Replacing kwargs in some methods of the obukhov_length function with regular args fixes this issue. Since these are internal methods, they probably shouldn't have kwargs anyway.

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• I have read and checked the items on the review checklist.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.84%. Comparing base (c1c7df6) to head (f54533e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #164   +/-   ##
=======================================
  Coverage   89.84%   89.84%           
=======================================
  Files           4        4           
  Lines         827      827           
=======================================
  Hits          743      743           
  Misses         84       84           

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[charleskawczynski]

Thanks, @dennisYatunin!