### Description
This change introduces the WebGPU EP into ONNX Runtime.
To make the PR as simple as possible, this PR excluded the following:
- C API changes for WebGPU EP
- actual implementation of WebGPU EP. Currently in this PR, WebGPU is a
stub implementation that does not register any kernel.
- Python IO Binding update
- Node.js IO Binding update
This PR now contains only 43 file changes (while the working branch
contains 130+) and hopefully this makes it easier to review.
There is going to be separated PRs for each mentioned above.
Current working branch: #21904
### Description
- Implement Objective-C binding for `ORTTrainingSession`
- Add `ORTUtils` utility class to handle conversion between C++ and
Objective-C types
- Add test case for saving checkpoint
- Add unit test cases for `ORTTrainingSession`
### Motivation and Context
This PR is part of implementing Objective-C bindings for training API.
It implements objective-c binding for training session. The objective-C
API closely resembles the C++ API.
---------
Co-authored-by: Edward Chen <18449977+edgchen1@users.noreply.github.com>
### Description
Implement Objective-C binding for `ORTCheckPoint`. Additionally,
- Modify `onnxruntime_objectivec.cmake` to only include training header
and sources when training flag is enabled
- Enable objective-c binding for `orttraining-mac-ci-pipeline`
### Motivation and Context
This PR is part of implementing Objective-C bindings for training API.
It implements objective-c binding for ORTCheckPoint class. The
objective-C API closely resembles the C++ API.
**Note**: The test for saving checkpoint is skipped as it requires use
of training session. It will be added when the objective-c binding for
`ORTTrainingSession` is added.
### Description
<!-- Describe your changes. -->
Add Swift Package Manager (SPM) support for ORT based on #14621
- uses the existing objective-c bindings
- some re-organization of the directory structure was required but the
contents of the files are unchanged, apart from adjustments due to file
movements
Add tool for updating ORT native pod used in the SPM package
Update CIs to use ORT native pod from build, and build/test using SPM
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
iOS developers are using SPM as much as cocoapods, so adding SPM means
both are catered for.
1. Remove the cmake option onnxruntime_DEV_MODE and replace it with
"--compile-no-warning-as-error"
2. Suppress some GSL warnings because now we treat nvcc diag warnings as
errors
Update Objective-C API to be more usable from Swift. E.g., to allow conversion from Objective-C methods with trailing NSError** parameter to throwing Swift methods.
Update CMake Objective-C framework setup.
