[Feature Request] [Compile API] Support compling directly from `OrtModel`

[shiyi9801]

Describe the feature request

In WebNN, we construct the graph in-memory as an OrtModel using the Model Editor API, but OrtCompileApi currently only supports setting the input model via a file path or buffer (ModelCompilationOptions_SetInputModelPath ModelCompilationOptions_SetInputModelFromBuffer).

Describe scenario use case

This feature is needed for WebNN model cache implementation.