Support formats other than PARQUET

[EvanBoyle]

Parquet is a nice default for withStreamingInputTable as kinesis handles transforming JSON into parquet. There are npm libraries to do this conversion manually yourself, but it can be inconvenient. We should support other file formats so that it is easy to create something like a static fact table:

const tableArgs: TableArgs = {
    columns,
    format: "JSON"
}

const dataWarehouse = new ServerlessDataWarehouse("analytics_dw")
    .withTable(impressionsTableName, genericTableArgs)

const s3Bucket = this.dataWarehouseBucket;

// ... configure an s3 client with a connection to the bucket ...
const dataFacts =  [
{
ad: 1, author: "evan", date: "12/26/2019"
},
{
ad: 2, author: "jordan", date: "12/27/2019
}
];
s3Client.put(s3Path, JSON.stringify(dataFacts));

Now we have a table with a static JSON dataset that is uploaded at deployment time. Will also be useful for batch tables.