Apply interleaved mRoPE to one [B, heads, L, headDim] tensor via the reference's exact Metal kernel. invFreq is the f32 device array from mropeInvFreq.
invFreq
Apply interleaved mRoPE to one [B, heads, L, headDim] tensor via the reference's exact Metal kernel.
invFreqis the f32 device array from mropeInvFreq.