feat(eventstore): increase parallel write capabilities (#5940)

This implementation increases parallel write capabilities of the eventstore.
Please have a look at the technical advisories: [05](https://zitadel.com/docs/support/advisory/a10005) and  [06](https://zitadel.com/docs/support/advisory/a10006).
The implementation of eventstore.push is rewritten and stored events are migrated to a new table `eventstore.events2`.
If you are using cockroach: make sure that the database user of ZITADEL has `VIEWACTIVITY` grant. This is used to query events.

internal/integration/config/postgres.yaml

@@ -3,7 +3,8 @@ Database:
     Host: localhost
     Port: 5432
     Database: zitadel
-    MaxOpenConns: 20
+    EventPushConnRatio: 0.2
+    MaxOpenConns: 40
     MaxIdleConns: 10
     User:
       Username: zitadel

internal/integration/config/zitadel.yaml

@@ -35,11 +35,14 @@ Quotas:
     Enabled: true
 
 Projections:
+  HandleActiveInstances: 60s
   Customizations:
     NotificationsQuotas:
       RequeueEvery: 1s
+      HandleActiveInstances: 60s
     Telemetry:
       RequeueEvery: 5s
+      HandleActiveInstances: 60s
 
 DefaultInstance:
   LoginPolicy: