Don't add migrations to the forwarder bindings (#1167)

As you can see on the comment on top of configureUniversalBindings(),
the forwarder does not have MongoDB.

Refs #1163

src/main/java/org/graylog/integrations/IntegrationsModule.java

@@ -139,6 +139,9 @@ private void configureServerOnlyBindings() {
                     GreyNoiseCommunityIpLookupAdapter.class,
                     GreyNoiseCommunityIpLookupAdapter.Factory.class,
                     GreyNoiseCommunityIpLookupAdapter.Config.class);
+
+            // PagerDuty notification type fix
+            addMigration(V20220622071600_MigratePagerDutyV1.class);
         }
     }
 
@@ -177,9 +180,6 @@ private void configureUniversalBindings() {
         bind(IamClientBuilder.class).toProvider(IamClient::builder);
         bind(CloudWatchLogsClientBuilder.class).toProvider(CloudWatchLogsClient::builder);
         bind(KinesisClientBuilder.class).toProvider(KinesisClient::builder);
-
-        // PagerDuty notification type fix
-        addMigration(V20220622071600_MigratePagerDutyV1.class);
     }
 
     /**