Smaato bid adapter: Optional bidder params to support in-app webview use cases

[sbrosinski]

Related to this PR for Prebid.js: prebid/Prebid.js#5765

In addition we now support tcf2.

We have clients who want to use Prebid.js inside an app's webview and transmit geo info or device ids that they may be able to use in this case.

In order to support this, we accept a new app object as an optional bidder param where they can add this additional info.
The params object of an adUnit making use of this feature would look like this:

  params: {
    publisherId: 'publisherId',
    adspaceId: 'adspaceId',
    app: {
      ifa: 'aDeviceId',
      geo: {
        lat: 33.3,
        lon: -88.8
      }
    }
  }