feat(oidc): token exchange impersonation (#7516)

* add token exchange feature flag

* allow setting reason and actor to access tokens

* impersonation

* set token types and scopes in response

* upgrade oidc to working draft state

* fix tests

* audience and scope validation

* id toke and jwt as input

* return id tokens

* add grant type  token exchange to app config

* add integration tests

* check and deny actors in api calls

* fix instance setting tests by triggering projection on write and cleanup

* insert sleep statements again

* solve linting issues

* add translations

* pin oidc v3.15.0

* resolve comments, add event translation

* fix refreshtoken test

* use ValidateAuthReqScopes from oidc

* apparently the linter can't make up its mind

* persist actor thru refresh tokens and check in tests

* remove unneeded triggers

internal/query/system_features_model.go

@@ -49,6 +49,7 @@ func (m *SystemFeaturesReadModel) Query() *eventstore.SearchQueryBuilder {
 			feature_v2.SystemTriggerIntrospectionProjectionsEventType,
 			feature_v2.SystemLegacyIntrospectionEventType,
 			feature_v2.SystemUserSchemaEventType,
+			feature_v2.SystemTokenExchangeEventType,
 		).
 		Builder().ResourceOwner(m.ResourceOwner)
 }
@@ -75,6 +76,8 @@ func (m *SystemFeaturesReadModel) reduceBoolFeature(event *feature_v2.SetEvent[b
 		dst = &m.system.LegacyIntrospection
 	case feature.KeyUserSchema:
 		dst = &m.system.UserSchema
+	case feature.KeyTokenExchange:
+		dst = &m.system.TokenExchange
 	}
 
 	*dst = FeatureSource[bool]{