[Storage] Added GenerateUserDelegationSasUri() for Blobs and BlobContainers

[nickliu-msft]

Implemented the functionality to generate SAS Uri through User Delegation key
This PR is only for Blobs and BlobContainers

[nickliu-msft]

TODO: Add tests, export apis, add samples, record tests, etc.

[jaschrep-msft]

@nickliu-msft I agree with Sean's comment. Additionally, suffixing a method with Internal in this codebase is really meant to convey a method is a joint sync/async implementation.

We shouldn't be suffixing Internal for every method with the internal visibility modifier. Rather, if there's an operation we need to run synchronously or asynchronously, we should be using a shared implementation suffixed this way, where the method signature ends with bool async, CancellationToken cancellationToken (in that order or the custom rules checker will yell). For public APIs, we just also need to expose the traditional sync and async methods.

[azure-sdk]

API change check

APIView has identified API level changes in this PR and created following API reviews.

Azure.Storage.Blobs

[seanmcc-msft]

Resolves #44426

[amnguye]

LGTM - had some minor comments

[nickliu-msft]

Will revert the [LiveOnly] test back to [RecordedTest] after stg96base2 is merged
#45679