Changes to List training runs

added the required property error_code to the response with the 401 status

added the required property error_code to the response with the 403 status

added the required property error_code to the response with the 404 status

added the required property error_code to the response with the 409 status

added the required property error_code to the response with the 422 status

added the required property error_code to the response with the 429 status

added the required property error_code to the response with the 500 status

the endpoint scheme security serviceAccount was added to the API

the security scope reference_sets:read was removed from the endpoint's security scheme oauth2

the endpoint scheme security bearerAuth was added to the API

the endpoint scheme security oauth2 was added to the API