pytorch

13445916 - [ONNX] Improve shape inference supporting inferred values and unspecified optionals (#78999)

[ONNX] Improve shape inference supporting inferred values and unspecified optionals (#78999) Extend to support the following in onnx shape inference: * Utilizing inferred constant values. Provides more information than just shape and type of the input. E.g. Enables `onnx::Resize` when `scales` input are constructed by `onnx::Concat` of constants. * `prim::Constant`, especially the one that represents `None`, which later represents unspecified optional input in ONNX. E.g. Enables `onnx::Resize` when the second optional input `roi` is not provided. Fixes #69346 Pull Request resolved: https://github.com/pytorch/pytorch/pull/78999 Approved by: https://github.com/justinchuby, https://github.com/garymm