Release Storage Track 2 Library Preview 2 for JavaScript

[HarshaNalluru]

• Aborter-controller updates [Storage] Update Blob/File/Queue to used the @azure/aborter-controller library #3667 - In PR
• SAS connection string [Storage] support SAS connection string #3290 - In PR
• Better identity integration [Storage] Better integration of @azure/identity #3944 - In PR
• dev connection string support [storage] support development connection string #3289 - Moving to preview 3
• Download convenience helpers Provide convenience helpers to download response into File, string, Blob, or Buffer #2603 - Moving to preview 3
• Changelog and breaking changes docs [Storage] Changelog and Breaking changes #4396

[HarshaNalluru]

[ For Changelog ]

Changes checked-in

• Updating the union type of credential to credential: SharedKeyCredential | AnonymousCredential | TokenCredential for storage-blob and storage-queue.

• Bug Fix - When used MessageIdClient constructor for connection string, storage service throws an error saying "URL is undefined".

Changes in PR

• [Breaking] Aborter class is no longer exposed from the package. You are expected to use
  the package @azure/abort-controller to pass an abort signal to any of the async operations.
  AbortController.timeout(<milliseconds>) can be utitlized as an abort signal.

• SAS connection string support to all the existing static methods and constructors that take in connection string as a parameter.