onnxruntime

02333293 - Removed all the deprecated python training code and related tests and utils (#18333)

Removed all the deprecated python training code and related tests and utils (#18333) ### Description Motivation for this PR is code cleanup. 1. Remove all deprecated python code related to orttrainer, old checkpoint, related tests and utils 2. Cleanup orttraining_pybind_state.cc to remove all deprecated bindings.