[EP ABI] Add OrtKernelInfo APIs for kernel-based plugin EPs

[adrianlizarraga]

Description

Adds new OrtKernelInfo APIs to enable plugin EP kernel implementations to retrieve operator metadata and access the parent EP instance.

• Added four new KernelInfo APIs: KernelInfo_GetOperatorDomain(), KernelInfo_GetOperatorType(), KernelInfo_GetOperatorSinceVersion(), and KernelInfo_GetEp()
• Extended example plugin EP to demonstrate accessing EP configuration from kernel implementations.

Motivation and Context

[Copilot]

Pull request overview

Copilot reviewed 22 out of 22 changed files in this pull request and generated 3 comments.

Comments suppressed due to low confidence (1)

onnxruntime/test/autoep/library/example_plugin_ep_kernel_registry/kernels/binary_op.cc:38

• Typo in the comment. The word 'implementations' should be singular 'implementation' when preceded by 'an actual' to maintain grammatical correctness.

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[fs-eire]

LGTM for the added APIs.

[Copilot]

Pull request overview

Copilot reviewed 23 out of 23 changed files in this pull request and generated 2 comments.

Comments suppressed due to low confidence (2)

onnxruntime/test/autoep/library/example_plugin_ep_kernel_registry/kernels/binary_op.cc:136

• The comment says "pre-pack mul initializers" but this kernel now handles both Mul and Add operators. The comment should be updated to say "pre-pack initializers" or "pre-pack mul/add initializers".
  onnxruntime/test/autoep/library/example_plugin_ep_kernel_registry/kernels/binary_op.cc:163
• This cast assumes GetEp() returns a valid ExampleKernelEp pointer without any type checking. If GetEp() returns a different plugin EP type (unlikely in this test scenario but possible in general usage), this cast would be unsafe and could lead to undefined behavior. Consider adding a safety check or documentation that this kernel implementation is only compatible with ExampleKernelEp.

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[Copilot]

Pull request overview

Copilot reviewed 25 out of 25 changed files in this pull request and generated no new comments.

Comments suppressed due to low confidence (1)

onnxruntime/test/autoep/library/example_plugin_ep_kernel_registry/kernels/binary_op.cc:54

• The ONNX domain is represented as an empty string (""), not "ai.onnx". The condition op_domain != "ai.onnx" will always evaluate to true for ONNX operators (which have domain ""), causing the validation to incorrectly reject valid Mul and Sub operators from the ONNX domain. This should be checking against an empty string instead.

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