feat: Add SAS token support to azure_storage_queue

[lsiddiquee]

Adds support for Shared Access Signature (SAS) token authentication to the Azure Queue Storage client library, aligning with the authentication patterns used in azure_storage_blob.

Changes

Features Added

• Added from_url() constructors for QueueClient and QueueServiceClient to enable direct URL-based client construction
• Added support for SAS token authentication through URL query parameters
• Made credential parameter optional (Option<Arc<dyn TokenCredential>>) on both new() and from_url() methods to support multiple authentication scenarios:
  • Entra ID authentication (when credential is provided)
  • SAS token authentication (when credential is None and URL contains SAS token)
  • Public access (when credential is None and no authentication in URL)

Breaking Changes

• Changed credential parameter to Option<Arc<dyn TokenCredential>> on client constructors
• Changed queue_name parameter from owned String to &str reference on QueueClient::new()
• Removed queue_name() accessor from QueueClient
• Removed public endpoint struct field (now accessed via method)
• Changed QueueServiceClient::queue_client() to return Result<QueueClient> instead of QueueClient

Implementation Details

• Created extension methods on generated clients (GeneratedQueueClient and GeneratedQueueServiceClient) to implement custom construction logic
• Added conditional pipeline building with BearerTokenAuthorizationPolicy only when credentials are provided
• Fixed test recording issue where child clients created by QueueServiceClient weren't inheriting test proxy instrumentation
• Stored QueueServiceClientOptions in QueueServiceClient to pass client options to child QueueClient instances

Examples and Tests

• Updated examples to demonstrate both Entra ID and SAS token authentication
• Added comprehensive test coverage for SAS token scenarios
• Refactored examples to use shared test logic for both authentication methods
• All tests pass in both record and playback modes

Documentation

• Updated README with corrected credential parameter usage
• Added example README documenting required environment variables for SAS token testing
• Updated CHANGELOG following azure_storage_blob conventions

[github-actions]

API Change Check

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

azure_storage_queue

[vincenttran-msft]

One nit about changelog, but other than that refactor looks like went smoothly! Thanks for your contributions here Likhan, we greatly appreciate it and Queue crate consumers surely will too 😄

Going to leave Jacob to do a final-pass.

[jalauzon-msft]

Unfortunately, we can't really check-in SAS tests for now as we don't have the ability to generate a SAS from the SDK. Also be careful about accidentally recording a real SAS URL into the assets and that would leak your account info (and flag us). I took a look at your assets for this PR, and it doesn't look like you leaked anything (the recordings for these tests were empty for some reason) but best to just remove these checked-in tests for now.

When removing tests, it's best to delete the recordings from the assets too.