onnxruntime

When quantize 4bit mamtul, force upgrade onnx domain opset to 21 (#21693)

### Description
When quantize MatMul to DQ + MatMul using 4bit QDQ tool chain,
previously the opsets of domains are not changed.
Now, when quantize MatMul to DQ + MatMul in QDQ format, force upgrade
onnx domain to opset 21.

### Motivation and Context
In QDQ format, DQ with int4 and blocked quantization is used. This
requires DQ with opset >= 21.
When quantize MatMul to DQ + MatMul, force upgrade onnx domain to opset
21.