merge_pr_52672

[WebNN] Fuse QDQ for reduce on tflite

This CL supports fusing dq->reduce->q subgraph on tflite.

QDQ fusion only support reduce operation with kSum, kMean, kMax and kMin
kinds. Input and output operands have to be dequantized from ints8, the
scale and zero point of input and output have to be scaler.

Bug: 401281047
Change-Id: Ibc727be20e4ef6a9e6ba923499c5799dd8b512f5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6566130
Reviewed-by: ningxin hu ningxin.hu@intel.com
Commit-Queue: Wei4 Wang wei4.wang@intel.com
Reviewed-by: Phillis Tang phillis@chromium.org
Cr-Commit-Position: refs/heads/main@{#1465308}