feat: Instance commands (#3385)

* fix: add events for domain

* fix: add/remove domain command side

* fix: add/remove domain command side

* fix: add/remove domain query side

* fix: create instance

* fix: merge v2

* fix: instance domain

* fix: instance domain

* fix: instance domain

* fix: instance domain

* fix: remove domain.IAMID from writemodels

* fix: remove domain.IAMID from writemodels

* fix: remove domain.IAMID from writemodels

* fix: remove domain.IAMID from writemodels

* fix: remove domain.IAMID from writemodels

* fix: remove domain.IAMID from writemodels

* fix: remove domain.IAMID from writemodels

* fix: remove domain.IAMID from writemodels

* fix: remove domain.IAMID from writemodels

* fix: remove domain.IAMID from api

* fix: remove domain.IAMID

* fix: remove domain.IAMID

* fix: add instance domain queries

* fix: fix after merge

* Update auth_request.go

* fix keypair

* remove unused code

* feat: read instance id from context

* feat: remove unused code

* feat: use instance id from context

* some fixes

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

internal/api/ui/login/custom_action.go

@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/caos/oidc/pkg/oidc"
+	"github.com/caos/zitadel/internal/api/authz"
 
 	"github.com/caos/zitadel/internal/actions"
 	"github.com/caos/zitadel/internal/domain"
@@ -15,7 +16,7 @@ func (l *Login) customExternalUserMapping(ctx context.Context, user *domain.Exte
 	if resourceOwner == "" {
 		resourceOwner = config.AggregateID
 	}
-	if resourceOwner == domain.IAMID {
+	if resourceOwner == authz.GetInstance(ctx).InstanceID() {
 		iam, err := l.query.Instance(ctx)
 		if err != nil {
 			return nil, err