fix: use domain models for v2 eventstore (#1151)

* fix: use domain models for v2 eventstore

* fix: user domain model

* Update internal/api/grpc/admin/login_policy_converter.go

Co-authored-by: Livio Amstutz <livio.a@gmail.com>

* fix: converter

Co-authored-by: Livio Amstutz <livio.a@gmail.com>

internal/v2/domain/machine.go

@@ -0,0 +1,14 @@
+package domain
+
+import "github.com/caos/zitadel/internal/eventstore/models"
+
+type Machine struct {
+	models.ObjectRoot
+
+	Name        string
+	Description string
+}
+
+func (sa *Machine) IsValid() bool {
+	return sa.Name != ""
+}