fix grid dim bug for eval_multi_multi_UBspline_3d_c_vgl_kernel #4421
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Proposed changes
This PR switches the GridDim.x and GridDim.y for eval_multi_multi_UBspline_3d_c_vgl_kernel to fix the issue that "num" can be larger than 65535, which is the maximum GridDim.y allowed in CUDA.
What type(s) of changes does this code introduce?
Does this introduce a breaking change?
What systems has this change been tested on?
A100.
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