Add derivative ignoring to frequency and position calculations in MultidimRoPE

[murrellb]

…otherwise it errors during the backward pass on GPU.

@AntonOresten please test and merge when you get a chance?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 31.72%. Comparing base (2279585) to head (3afc32e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #33   +/-   ##
=======================================
  Coverage   31.72%   31.72%           
=======================================
  Files          36       36           
  Lines         769      769           
=======================================
  Hits          244      244           
  Misses        525      525           

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