onnxruntime

Fork the WinML APIs into the Microsoft namespace (#3503)

* Migrate winml to Microsoft Namespace (packaging changes are pending)

* add ns_prefix toggle

* fix packaging

* Users/sheilk/add missing raw header (#3484)

* add dualapipartition

* wrong variable for repo root

Co-authored-by: Sheil Kumar <sheilk@microsoft.com>

* remove existence check to force failures

* extra paren

* dualapipartition needs to be referenced from the source

* add microsoft.ai.machinelearning.dll to the output dir

* rename the idl file so that assembly info is correctly added into the winmd

* fix namespaces

* update namespaces

* default to microsoft, and add namespace override as build argument

* update cmakesetings.json as well

* remove from cmakelists.txt

Co-authored-by: Sheil Kumar <sheilk@microsoft.com>
Co-authored-by: Changming Sun <chasun@microsoft.com>