Seedtag: Adds GPP macros on user sync url (prebid#4465)

Author: sangarbe

static/bidder-info/seedtag.yaml

@@ -10,5 +10,5 @@ capabilities:
       - banner
 userSync:
   iframe:
-    url: "https://s.seedtag.com/cs/cookiesync/prebid?gdpr={{.GDPR}}&gdpr_consent={{.GDPRConsent}}&usp_consent={{.USPrivacy}}&redirect={{.RedirectURL}}"
+    url: "https://s.seedtag.com/cs/cookiesync/prebid?gdpr={{.GDPR}}&gdpr_consent={{.GDPRConsent}}&usp_consent={{.USPrivacy}}&gpp={{.GPP}}&gpp_sid={{.GPPSID}}&redirect={{.RedirectURL}}"
     userMacro: "$UID"