Optidigital adapter: Add GPP support (#4333)

Author: osulzhenko

src/main/resources/bidder-config/optidigital.yaml

@@ -17,6 +17,6 @@ adapters:
     usersync:
       cookie-family-name: optidigital
       iframe:
-        url: https://scripts.opti-digital.com/js/presyncs2s.html?endpoint=optidigital&gdpr={{gdpr}}&gdpr_consent={{gdpr_consent}}&us_privacy={{us_privacy}}&redir={{redirect_url}}
+        url: https://scripts.opti-digital.com/js/presyncs2s.html?endpoint=optidigital&gdpr={{gdpr}}&gdpr_consent={{gdpr_consent}}&us_privacy={{us_privacy}}&gpp={{gpp}}&gpp_sid={{gpp_sid}}&redir={{redirect_url}}
         support-cors: false
         uid-macro: '$UID'