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.

cmd/setup/15/cockroach/07_cs_from_adminapi.sql

@@ -0,0 +1,28 @@
+INSERT INTO projections.current_states (
+    projection_name
+    , instance_id
+    , event_date
+    , "position"
+    , last_updated
+) (SELECT 
+    cs.view_name
+    , cs.instance_id
+    , e.created_at
+    , e.position
+    , cs.last_successful_spooler_run
+FROM 
+    adminapi.current_sequences cs
+JOIN eventstore.events2 e ON
+    e.instance_id = cs.instance_id 
+    AND e.sequence = cs.current_sequence 
+    AND cs.current_sequence = (
+        SELECT 
+            MAX(cs2.current_sequence)
+        FROM
+            adminapi.current_sequences cs2
+        WHERE
+            cs.view_name = cs2.view_name
+            AND cs.instance_id = cs2.instance_id
+    )
+)
+ON CONFLICT DO NOTHING;