Add additional Prebid debug flags to OpenRTB requests

.env.example

@@ -42,6 +42,7 @@ TRUSTED_SERVER__INTEGRATIONS__PREBID__ENABLED=false
 # TRUSTED_SERVER__INTEGRATIONS__PREBID__BIDDERS=kargo,rubicon,appnexus
 # TRUSTED_SERVER__INTEGRATIONS__PREBID__AUTO_CONFIGURE=false
 # TRUSTED_SERVER__INTEGRATIONS__PREBID__DEBUG=false
+# TRUSTED_SERVER__INTEGRATIONS__PREBID__TEST_MODE=false
 
 # Next.js
 TRUSTED_SERVER__INTEGRATIONS__NEXTJS__ENABLED=false