Go sdk , needs to support the decoding of response type 'Content-type': 'text/plain; charset=utf-8'

[Ramv4694]

When encountering the GatewayTimeout error with the message "Cannot get a timely response for this API request." and the message ID "bullwinkle_gateway_timeout" upon making an API request, the response header indicates Content-Type: text/plain; charset=utf-8. The response body in this case is a JSON-formatted error message.

However, the current Go SDK does not support handling this content type correctly, leading to an "undefined response type" at https://github.com/CiscoDevNet/intersight-go/blob/main/client.go#L781 and failing to process the error message at https://github.com/CiscoDevNet/intersight-go/blob/main/client.go#L833C21-L833C44.

To address this, the decode function in the SDK should be enhanced to support the text/plain; charset=utf-8 content type. This improvement will ensure that JSON-formatted error messages in plain text responses are correctly parsed and returned to the user, providing a more accurate and informative error response.