.Net: Add request uri and payload to RestApiOperationResponse

[markwallace-microsoft]

Motivation and Context

Closes #6071

Description

Add a new EnablePayloadInResponse execution parameter which determines whether payload will be included in the RestApiOperationResponse. If true, the payload will be included in the response. Otherwise the payload will not be included and RestApiOperationResponse.Payload will be null. RestApiOperationResponse.IncludesPayload will be set to true if the payload is included in the response.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[zengin]

@markwallace-microsoft can we add request method as well? There might be cases where URL is the same, but operation is different. That information might be useful in making sure that LLM didn't choose the wrong operation.