Adapt response structure of LAPIS 2 to LAPIS 1

[fengelniederhammer]

LAPIS 2 currently simply returns the data as they are.

LAPIS 1 returns some additional information and the data wrapped in a "data" field:

{
    "errors": [],
    "info": {
        "apiVersion": 1,
        "dataVersion": 1691410888,
        "deprecationDate": null,
        "deprecationInfo": null,
        "acknowledgement": null
    },
    "data": [
        {
            "date": "2023-07-16",
            "count": 1
        },
        ...
    ]
}

Wrap the response data in a data field, so that we can easily extend it later with further information without breaking changes.