onnxruntime

Address follow-up comments on multistream pr #13495 (#13992)

### Description
This PR is to address follow-up comments for the multi-stream pr
https://github.com/microsoft/onnxruntime/pull/13495

Changes including:

- Make StreamAwareArena transparent to minimal build
- Make DeviceStreamCollection transparent to minimal build
- Replace ORT_MUST_USE_RESULT with [[nodiscard]]
- Remove unnecessary shared_ptr


### Motivation and Context
This PR is to address follow-up comments for the multi-stream pr
https://github.com/microsoft/onnxruntime/pull/13495

Co-authored-by: Lei Cao <leca@microsoft.com>