Refactor Type Parser b/w Schemas & IRParser into a type common parser (#17383)
Summary:
Creates a new shared type parser to be shared between the IR parser and the Schema Parser.
Also adds parsing of CompleteTensorType and DimensionedTensorType, and feature-gates that for the IRParser.
Renames the existing type_parser for python annotations, python_type_parser, and names the new one jit_type_parser.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/17383
Differential Revision: D14186438
Pulled By: eellison
fbshipit-source-id: bbd5e337917d8862c7c6fa0a0006efa101c76afe
