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.
* feat: migrate external id
* implement tests and some renaming
* fix projection
* cleanup
* i18n
* fix event type
* handle migration for new services as well
* typo
(cherry picked from commit 45262e6829)
