Improve retries for failed Requests

[jpvajda]

Issue

Performing retries on failed Rest requests could be easier.

A customer using the JS SDK is getting errors ETIMEDOUT and ECONNRESET , and they're wondering if those errors could be caught with a LiveTranscriptionEvents.Error . We can consider this for the .NET SDK as well.

Acceptance Criteria

• For Rest Requests make it easy to implement retries
• For Streaming Requests make it easy to implement retries

[jpvajda]

@dvonthenen