[CUDA] Extend Pad support through opset 25 with wrap mode

[Copilot]

Description

This PR consolidates PRs #27416 and #27708 to extend CUDA Pad kernel support through opset 25, including wrap mode implementation.

Motivation and Context

The CUDA execution provider previously only registered the Pad kernel up to opset 18 and did not implement wrap mode. When an ONNX model exported with opset 19+ was run on the CUDA executor, the Pad operation was forced to fall back to CPU, resulting in significant performance degradation. This PR aligns CUDA Pad registration with the ONNX Pad schema evolution through opset 25 and provides a correct wrap mode implementation.

Related issues: #26393
Related PRs: #27416, #27708

Summary of Changes

Kernel registration and opset coverage

File	Change
onnxruntime/core/providers/cuda/tensor/pad.cc	Adds CUDA Pad kernel registrations for opset ranges 18, 19-20, 21-22, 23, 24, and 25.
onnxruntime/core/providers/cuda/cuda_execution_provider.cc	Registers the new Pad kernel versions in the CUDA EP registry under the existing per-opset sections.

CUDA Pad implementation

File	Change
onnxruntime/core/providers/cuda/tensor/pad_impl.h	Extends the Pad kernel interface to pass effective sliced extents and per-axis input offsets.
onnxruntime/core/providers/cuda/tensor/pad_impl.cu	Adds CUDA wrap mode using a WrapCoordinate device helper with if constexpr compile-time specialization. Removes dead wrap code from the NCHW-specialized kernel path.
onnxruntime/core/providers/cuda/tensor/pad.cc	Computes effective sliced input extents/offsets for wrap behavior with negative pads. Bypasses the NCHW fast-path for wrap mode and routes through the generic implementation.

Documentation

File	Change
docs/OperatorKernels.md	Updates the CUDA Pad kernel opset coverage to reflect the new version splits (25+, 24, 23, [21,22], [19,20], 18) up to opset 25.

Test coverage

File	Change
onnxruntime/test/providers/cpu/tensor/pad_test.cc	Adds CUDA-only Pad coverage for edge across opsets 18-25 and wrap across opsets 19-25. Updates existing wrap test comment.

Checklist

• Tests added/updated
• No breaking changes

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[ShirasawaSama]

Thanks!

[tianleiwu]

@copilot, please update ‎docs/OperatorKernels.md. You can follow PR #27708.

[Copilot]

@copilot, please update ‎docs/OperatorKernels.md. You can follow PR #27708.

Updated docs/OperatorKernels.md with the CUDA Pad opset breakdown (25+, 24, 23, [21,22], [19,20], 18) matching PR #27708's pattern in commit f5e748c.

[tianleiwu]

/azp run Windows GPU Doc Gen CI Pipeline, Python format

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