remove path and database fields from FDA object

[fgalan]

In the same sense bucket has been removed from the API and it is established based in convention (https://github.com/telefonicaid/fiware-data-access/blob/main/doc/advanced.md#bucket-name-convention), should do the same with path?

[JuanMartinP]

Confirmed, we used the fdaId for the parquet file name.

[JuanMartinP]

Delete database clausule from action /fdas and use fiware-service.

Expected result:

{
    "id": "fda4",
    "query": "SELECT a.entityId, a.status, l.temperature, l.fillinglevel, l.serialnumber FROM alcobendas.widgetsvalidation_validationasset AS a LEFT JOIN alcobendas.widgetsvalidation_validationasset_lastdata AS l ON a.entityId = l.entityId",
    "description": "FDA 1 para la bd alcobendas"
}

[fgalan]

Fix documentation (API.md, database.md) to remove the fields.

Explain in https://github.com/telefonicaid/fiware-data-access/blob/main/doc/advanced.md the new conventions.