onnxruntime

d4485474 - Remove SessionOptionsSetWeightlessSourceModelPath and its getter

Remove SessionOptionsSetWeightlessSourceModelPath and its getter The source model file path is set via the session config string ep.context_source_model_path which the EP reads directly. No dedicated C API or OrtEpApi getter is needed for the file path case. Keep only the buffer-based APIs since byte buffers cannot be passed via config strings. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>