[onnx] Support test build and rename features

[luncliff]

Changes

• Support onnx[test]
• Rename existing feature with vcpkg_check_features(INVERTED_FEATURES)

References

• https://github.com/onnx/onnx/releases/tag/v1.15.0
• [onnx] update to 1.15.0 #143
• [onnx] support more features #141

Triplet Support

• x64-windows
• x64-linux
• x64-osx

Configuration

"vcpkg-configuration.json" changes for the release.

{
    "registries": [
        {
            "kind": "git",
            "repository": "https://github.com/luncliff/vcpkg-registry",
            "packages": [
                "onnx"
            ],
            "baseline": "..."
        }
    ]
}