Wei Hu

Implement Response abstraction for Azure

3

Resolves #45705

https://github.com/Azure/azure-sdk-for-net/issues/46800 - In `CreateXXXRequest` method implementation, `RequestContext` should be used for [HttpMessage creation] - Avoid [RequestMethod](https://github.com/Azure/azure-sdk-for-net/pull/46530#discussion_r1813194680) instance allocation - request header should be set instead of [add](https://github.com/Azure/azure-sdk-for-net/pull/46530#discussion_r1813195124) - CancellationToken should...

Putting together remaining issues/comments from [initial PR](https://github.com/Azure/azure-sdk-for-net/pull/46530) - In `CreateXXXRequest` method implementation, `RequestContext` should be used for [HttpMessage creation](https://github.com/Azure/azure-sdk-for-net/pull/46530#discussion_r1800844280) - [Classifier2xxAnd4xx](https://github.com/Azure/azure-sdk-for-net/pull/46530#discussion_r1800850483) needs further refinement - Authentication policy is missing for...