adot: add publisher id retrieval from bidder config

[mlequain]

Type of change

• Feature

Description of change

Partners can now set a publisherId for adot using pbjs.setBidderConfig so it can be retrieved by the adapter and added to the generated bid requests.

pbjs.setBidderConfig({
    bidders: ['adot'],
    config: {
        adot: {
            publisherId: '__PARTNER_PUBLISHER_ID__'
        }
    }
});