DSA legal basis validations

[bretg]

Pulling the legal basis validation check out of #3438 for further discussion:

if dsaparams in the response contains nonconsented reasons for selecting the ad, toss the response, using this table to map params to tcf2 consent strings (via an activity layer) prebid/Prebid.js#10982 (comment)

Basically, we need to discuss how to position these checks relative to the Activity Controls