Add usable fields to error queue

[soharab-ic]

• Currently, If a MQT returns an error then we put an error log in error queue which is not very useful.
• This PR will add a JSON string to the error queue with all the relevant values such as Message, HTTPEndpoint, ResponseBody and StatusCode etc.

{
    "FunctionHTTPRequest": {
        "Message": "{\"message_number\": 1, \"time_stamp\": \"2024-09-16T09:58:02Z\"}",
        "HTTPEndpoint": "http://router.fission/fission-function/kafka-consumer",
        "Headers": {
            "Content-Type": [
                "application/json"
            ],
            "KEDA-Error-Topic": [
                "error-topic"
            ],
            "KEDA-Response-Topic": [
                "response-topic"
            ],
            "KEDA-Source-Name": [
                "kafkatest"
            ],
            "KEDA-Topic": [
                "request-topic"
            ]
        }
    },
    "FunctionHTTPResponse": {
        "ResponseBody": "{\"MESSAGE_NUMBER\": 1, \"TIME_STAMP\": \"2024-09-16T09:58:02Z\"}",
        "StatusCode": 404,
        "ErrorString": "request returned failure: 404. http_endpoint: http://router.fission/fission-function/kafka-consumer, source: kafkatest"
    }
}

Fixes #166