[Bug Fix] Missing CustomOp SchemaRegister when generator EPContext ONNX model

[mingyueliuh]

Description

Enhancements to EPContext Operations:

1. Introduced support for the bfloat16 data type in EPContext operations.
2. Bug Fix: Missing Custom OP Schema Registration when generator EPContext ONNX model

[mingyueliuh]

@jywu-msft / @adrianlizarraga please take a look when you are available. Thanks.

[mingyueliuh]

@jywu-msft Could you help review this PR . Thanks.

[jywu-msft]

/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, MacOS CI Pipeline, ONNX Runtime Web CI Pipeline, onnxruntime-binary-size-checks-ci-pipeline, Linux QNN CI Pipeline

[jywu-msft]

/azp run Big Models, Linux Android Emulator QNN CI Pipeline, Windows GPU CUDA CI Pipeline, Windows GPU DML CI Pipeline, Windows GPU Doc Gen CI Pipeline

[jywu-msft]

/azp run Windows ARM64 QNN CI Pipeline, Windows CPU CI Pipeline, Windows GPU TensorRT CI Pipeline, Windows x64 QNN CI Pipeline, orttraining-linux-ci-pipeline, orttraining-linux-gpu-ci-pipeline

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[jywu-msft]

https://dev.azure.com/onnxruntime/onnxruntime/_build/results?buildId=1574765&view=logs&j=7f366e99-16b2-52cc-e1ff-653af284e397&t=5c9cf234-f957-5fdc-9c37-89899bf73c0c
i think ContribOperators.md needs to be updated too
+@HectorSVC

[HectorSVC]

https://dev.azure.com/onnxruntime/onnxruntime/_build/results?buildId=1574765&view=logs&j=7f366e99-16b2-52cc-e1ff-653af284e397&t=5c9cf234-f957-5fdc-9c37-89899bf73c0c i think ContribOperators.md needs to be updated too +@HectorSVC

good catch. I pushed a commit to fix that.

[HectorSVC]

/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, MacOS CI Pipeline, ONNX Runtime Web CI Pipeline, onnxruntime-binary-size-checks-ci-pipeline, Linux QNN CI Pipeline

[HectorSVC]

/azp run Big Models, Linux Android Emulator QNN CI Pipeline, Windows GPU CUDA CI Pipeline, Windows GPU DML CI Pipeline, Windows GPU Doc Gen CI Pipeline

[azure-pipelines]

Azure Pipelines successfully started running 9 pipeline(s).

[HectorSVC]

/azp run Windows ARM64 QNN CI Pipeline, Windows CPU CI Pipeline, Windows GPU TensorRT CI Pipeline, Windows x64 QNN CI Pipeline, orttraining-linux-ci-pipeline, orttraining-linux-gpu-ci-pipeline

[azure-pipelines]

Azure Pipelines successfully started running 5 pipeline(s).

[azure-pipelines]

Azure Pipelines successfully started running 4 pipeline(s).