[ROCm EP/ MIGraphx EP] matmul_nbits: Use GPU_WARP_SIZE_HOST for host side code (#22045)

### Description
For ROCm device, the host side code needs to call GPU_WARP_SIZE_HOST to
query warpSize
of the underlying GPU device.

### Motivation and Context
Fixes MatMulNBits tests on gfx1100/01 which has warpSize of 32.

Signed-off-by: Jagadish Krishnamoorthy <jagadish.krishnamoorthy@amd.com>

onnxruntime/contrib_ops/cuda/quantization/matmul_nbits.cu

@@ -289,7 +289,7 @@ bool TryMatMul4Bits(
     return false;
   }
   dim3 blocks((n + kColsPerThreadBlock - 1) / kColsPerThreadBlock, m);
-  dim3 threads(kWarpSize, kColsPerThreadBlock);
+  dim3 threads(GPU_WARP_SIZE_HOST, kColsPerThreadBlock);
   int blocks_per_K = (k + block_size - 1) / block_size;
   int shared_mem_size = sizeof(T) * blocks_per_K * kColsPerThreadBlock +
                         (zero_points != nullptr ? (blocks_per_K + 1) / 2 * kColsPerThreadBlock * 2 : 0);