Fix ARM64 build + Add NuGet pipeline including ARM binaries

[jignparm]

Description: --arm64 build requires changes to CMakeLists.txt to pass. Also, adding a NuGet pipeline to include arm binaries into package.

Motivation and Context
This PR fixes the --arm64 cross-compile build option, by commenting out an error-generating flag in CMakeLists.txt. Also adds a new pipeline to package arm64 compiled bits.

[snnn]

Please see https://github.com/microsoft/onnxruntime/blob/master/cmake/CMakeLists.txt#L436 and https://github.com/microsoft/onnxruntime/blob/master/cmake/CMakeLists.txt#L455. I would recommend solve it in that way. So that we don't need to add an extra cmake option.

[jignparm]

Please see https://github.com/microsoft/onnxruntime/blob/master/cmake/CMakeLists.txt#L436 and https://github.com/microsoft/onnxruntime/blob/master/cmake/CMakeLists.txt#L455. I would recommend solve it in that way. So that we don't need to add an extra cmake option.

Good comment. Updated to reduce flags in CMakeLists.