Changes to Start deletion of GitHub data source

added the non-success response with the status 502

added the optional property error/code to the response with the 400 status

added the optional property error/code to the response with the 401 status

added the optional property error/code to the response with the 404 status

added the optional property error/code to the response with the 500 status

added the optional property error/details to the response with the 400 status

added the optional property error/details to the response with the 401 status

added the optional property error/details to the response with the 404 status

added the optional property error/details to the response with the 500 status

added the optional property error/request_id to the response with the 400 status

added the optional property error/request_id to the response with the 401 status

added the optional property error/request_id to the response with the 404 status

added the optional property error/request_id to the response with the 500 status

added the optional property error/retryable to the response with the 400 status

added the optional property error/retryable to the response with the 401 status

added the optional property error/retryable to the response with the 404 status

added the optional property error/retryable to the response with the 500 status

added the optional property metadata to the response with the 200 status

endpoint added