model : wire up Nemotron-H tensors for NVFP4 support

[CISC]

prep #20539

[CISC]

As an apropos, when #20427 (comment) is addressed, an optional bias should also be added:

llama.cpp/src/models/nemotron-h.cpp

Lines 69 to 74 in da0c8a5

	ggml_tensor * Qcur = build_lora_mm(model.layers[il].wq, cur);
	cb(Qcur, "Qcur", il);
	if (model.layers[il].bq) {
	Qcur = ggml_add(ctx0, Qcur, model.layers[il].bq);
	cb(Qcur, "Qcur", il);
	}

cc/ @richarddd