[webgpu] optimize SkipLayerNormalization operator

[xhcao]

If the sizes of batch_size and sequence_length are ones, split the hidden_size to improve parallelism.

Description

Motivation and Context

[xhcao]

The outputs of SkipLayerNormalization operator in phi3.5 are output and input_skip_bias_sum, and their shapes are [batch_size, sequence_length, hidden_size], on decoding stage, the batch_size and sequence_length are always 1, the outputs' shapes are [1, 1, 3072], there is only one work group, which does not use gpu resources well.
For this situation, 1. the PR splits hidden dim to add workgroup, although adds workload, but reduces the average workload of one work group. 2. Handle output and input_skip_bias_sum in different work groups. If so, the total work groups are 12 for the shape [1, 1, 3072].
Use Intel GPA tool to capture the data, from ~20us to ~10us.


@jchen10 @hujiajie PTAL, thanks

[guschmue]

/azp run ONNX Runtime Web CI Pipeline,Windows GPU CI Pipeline,Linux Android Emulator QNN CI Pipeline

[guschmue]

/azp run Linux CPU CI Pipeline,Linux CPU Minimal Build E2E CI Pipeline,Linux GPU CI Pipeline,Linux GPU TensorRT CI Pipeline, Linux OpenVINO CI Pipeline,Linux QNN CI Pipeline,MacOS CI Pipeline,Windows ARM64 QNN CI Pipeline,Windows CPU CI Pipeline

[guschmue]

/azp run Windows GPU TensorRT CI Pipeline,onnxruntime-binary-size-checks-ci-pipeline,orttraining-linux-ci-pipeline,orttraining-linux-gpu-ci-pipeline,orttraining-ortmodule-distributed,Windows x64 QNN CI Pipeline,Big Models

[azure-pipelines]

Azure Pipelines successfully started running 2 pipeline(s).

[guschmue]

/azp run Windows GPU CUDA CI Pipeline,Windows GPU DML CI Pipeline,Windows GPU Doc Gen CI Pipeline, Win_TRT_Minimal_CUDA_Test_CI

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[azure-pipelines]

Azure Pipelines successfully started running 2 pipeline(s).

[azure-pipelines]

Azure Pipelines successfully started running 7 pipeline(s).

[guschmue]

lgtm.
CI pipelines changed - can you merge with main?

[xhcao]

lgtm. CI pipelines changed - can you merge with main?

Updated

[guschmue]

/azp run Linux QNN CI Pipeline,Win_TRT_Minimal_CUDA_Test_CI,Windows ARM64 QNN CI Pipeline,Windows GPU Doc Gen CI Pipeline,Windows x64 QNN CI Pipeline

[azure-pipelines]

Azure Pipelines successfully started running 5 pipeline(s).