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/version.go

@@ -1,7 +1,18 @@
 package eventstore
 
 import (
-	"github.com/zitadel/zitadel/internal/eventstore/repository"
+	"regexp"
+
+	"github.com/zitadel/zitadel/internal/errors"
 )
 
-type Version repository.Version
+type Version string
+
+var versionRegexp = regexp.MustCompile(`^v[0-9]+(\.[0-9]+){0,2}$`)
+
+func (v Version) Validate() error {
+	if !versionRegexp.MatchString(string(v)) {
+		return errors.ThrowPreconditionFailed(nil, "MODEL-luDuS", "version is not semver")
+	}
+	return nil
+}