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/eventstore/handler/v2/failed_event_get_count.sql

@@ -0,0 +1,12 @@
+WITH failures AS (
+    SELECT 
+        failure_count 
+    FROM 
+        projections.failed_events2
+    WHERE 
+        projection_name = $1
+        AND instance_id = $2
+        AND aggregate_type = $3
+        AND aggregate_id = $4
+        AND failed_sequence = $5
+) SELECT COALESCE((SELECT failure_count FROM failures), 0) AS failure_count