CUDA: Handle compute type for NVFP4 on cublass path (#29173)

* CUDA: Handle compute type for NVFP4 on cublass path

Signed-off-by: ynankani <ynankani@nvidia.com>

* Use BF16 compute type for quantized models if HW allows

Signed-off-by: ynankani <ynankani@nvidia.com>

* Set acc prec to bf16 for nvfp4 as it needs atleast bf16 range

Signed-off-by: ynankani <ynankani@nvidia.com>

* Update ggml/src/ggml-cuda/ggml-cuda.cu

Co-authored-by: Johannes Gäßler <johannesg@5d6.de>

* preserve op_params for per-expert matmul

Signed-off-by: ynankani <ynankani@nvidia.com>

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Signed-off-by: ynankani <ynankani@nvidia.com>
Co-authored-by: Johannes Gäßler <johannesg@5d6.de>