feat(workflow): Expose updateId to update handlers

[antlai-temporal]

What was changed

A method currentUpdateInfo() has been added to workflow to obtain the name and id of a currently executing update handler from within. The solution uses AsyncLocalStorage to propagate this information across asynchronous invocations. Calling currentUpdateInfo() within a workflow, but outside the async scope of an update handler invocation, returns undefined.

Why?

Facilitate deduplication of updates, particularly across CAN boundaries.

Checklist

1. Closes
   [Feature Request] Expose updateId to Update handlers #1317

[mjameswh]

See review comments.