fix(tracing): Force-disable self-tracing on on-premise (#285)

Author: BYK

sentry/config.example.yml

@@ -67,3 +67,5 @@ system.internal-url-prefix: 'http://web:9000'
 symbolicator.enabled: true
 symbolicator.options:
   url: "http://symbolicator:3021"
+
+transaction-events.force-disable-internal-project: true