TACO-511 Add Price Floors Mechanism

[szymon-nawrocki]

Ticket

https://fandom.atlassian.net/browse/TACO-511

Description

Add Price Floors mechanism for handling Prebid Price Floor Module. It should work in a way that that the configuration will be set in ICBM variable icPrebidPriceFloorsConfig and it will have the configuration with price per bidder. It will look like this:

{
    "appnexus": 0.1,
    "rubicon": 0.05,
    "indexExchange": 0.15,
    "ozone": 0.20,
    "triplelift": 1.10,
    "medianet": 2.22
}

This configuration should be then set in pbjs config floors.data.values.

The keys are mapped to look like: "banner|<bidder_name>: <bidder_price". The banner mediaType is added so it will be applied only to banner mediaType and not affect video bids for example.

Link do Price Floors module documentation: https://docs.prebid.org/dev-docs/modules/floors.html