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/command/org_flow_test.go

@@ -79,11 +79,9 @@ func TestCommands_ClearFlow(t *testing.T) {
 						),
 					),
 					expectPush(
-						eventPusherToEvents(
-							org.NewFlowClearedEvent(context.Background(),
-								&org.NewAggregate("org1").Aggregate,
-								domain.FlowTypeExternalAuthentication,
-							),
+						org.NewFlowClearedEvent(context.Background(),
+							&org.NewAggregate("org1").Aggregate,
+							domain.FlowTypeExternalAuthentication,
 						),
 					),
 				),
@@ -241,13 +239,11 @@ func TestCommands_SetTriggerActions(t *testing.T) {
 						),
 					),
 					expectPush(
-						eventPusherToEvents(
-							org.NewTriggerActionsSetEvent(context.Background(),
-								&org.NewAggregate("org1").Aggregate,
-								domain.FlowTypeExternalAuthentication,
-								domain.TriggerTypePostAuthentication,
-								[]string{"actionID1"},
-							),
+						org.NewTriggerActionsSetEvent(context.Background(),
+							&org.NewAggregate("org1").Aggregate,
+							domain.FlowTypeExternalAuthentication,
+							domain.TriggerTypePostAuthentication,
+							[]string{"actionID1"},
 						),
 					),
 				),