PBS Adapter: user segments in bidder config may grow the payload object size with repeated information

[patmmccann]

Description

Since PBS does not do server side array merges, https://github.com/prebid/Prebid.js/pull/12571/files , will allow user segment arrays to be repeated for each bidder in bidder config. This can result in a very large object. In the case of eids, there are some optimizations using eidPermissions, but this is not possible in user data segments. We may need a 'doJSstyleMerge' argument or a user data permission type flag. We also need a pair'ed issue on the PBS board