[Vulkan] rewrite quantized add, mul, conv2d and conv2d_relu ops (#97468)
Summary:
This diffs registers the vulkan quantized binary ops (add/sub/mul/div), and adds graph rewrites for quantized add, mul, conv2d and conv2d_relu.
The rewrites for conv2d and conv2d_relu make use of the convert_qconv2d_context introduced in D41595032
Test Plan: export quantized mcs model to vulkan
Reviewed By: SS-JIA
Differential Revision: D44189363
Pull Request resolved: https://github.com/pytorch/pytorch/pull/97468
Approved by: https://github.com/SS-JIA
