Add build time python type stub generation

[chemwolf6922]

Changes

• Generate type info in the wheel. This enables type hints and checks.
• Expose the enum OgaElementType which is used as a return type but not declared in python.

Adjustments compare to #1742

The following adjustments were made to avoid breaking the internal ado build pipelines:

• Use onnxruntime python package's included libraries instead of copying libraries to the same folder for stub generation.
• Use mypy instead of pybind11-stubgen for stub generation. Which can generate stub against the whole package. Enabling the use of the existing library loading scripts during stub generation to avoid loading wrong onnxruntime libraries in some build environment.

[chemwolf6922]

Example of the type stub in action:

[chemwolf6922]

Hi @baijumeswani, I have verified the changes in the ado python pipelines. Please help take a look. Thanks.

[chemwolf6922]

Closing this one in favor of #1844