onnxruntime

9afb0d2b - Fix validation for external data paths for models loaded from bytes (#27430)

Fix validation for external data paths for models loaded from bytes (#27430) ### Description This PR fixes the validation of external data paths when ONNX models are loaded from bytes (in-memory). Previously, when a model was loaded from bytes without an explicit external data folder path being set, path using ".." sequences were not properly validated, potentially allowing access to arbitrary files on the filesystem. ### Motivation and Context Address a security concern