APIs not conforming to the API spec

[ChakshuGautam]

Similar to how the bot and userSegment APIs have a concrete request-response structure, the ODK forms API is not following the same.

{
    "id": "api.userSegment.get",
    "ver": "1.0",
    "ts": "2021-07-26T05:36:39.485Z",
    "params": {
        "resmsgid": "73658ed0-edd3-11eb-bdf3-31f208f20801",
        "msgid": null,
        "status": "failed",
        "err": "UNAUTHORIZED_REQUEST",
        "errmsg": "The user is not the owner of the asset."
    },
    "responseCode": "CLIENT_ERROR",
    "result": {}
}

Use the messageUtils to define the messages relevant to forms and the successResponse and successResponse functions to create the response structure.