Optidigital: Add GPP support to user sync (#4646)

Co-authored-by: Victor Gonzalez <[email protected]>

Author: optidigital-prebid

static/bidder-info/optidigital.yaml

@@ -19,5 +19,5 @@ userSync:
   supports:
     - iframe
   iframe:
-    url: "https://scripts.opti-digital.com/js/presyncs2s.html?endpoint=optidigital&gdpr={{.GDPR}}&gdpr_consent={{.GDPRConsent}}&us_privacy={{.USPrivacy}}&redir={{.RedirectURL}}"
+    url: "https://scripts.opti-digital.com/js/presyncs2s.html?endpoint=optidigital&gdpr={{.GDPR}}&gdpr_consent={{.GDPRConsent}}&us_privacy={{.USPrivacy}}&gpp={{.GPP}}&gpp_sid={{.GPPSID}}&redir={{.RedirectURL}}"
     userMacro: "$UID"