Add bidder alias to the CSV data file

[bretg]

Got a community request to add the bidder alias to the CSV data file. Will add it to the end to hopefully avoid breaking changes to anyone who's written a script to parse out the column numbers.

[bretg]

Done. There are two new fields in the CSV: aliasOf and adapterFilename.

Note: this CSV file is linked to from the bidder params page https://docs.prebid.org/dev-docs/bidders.html

[AtifIqbal123]

Thanks Bretg