cms: clean up model file (#87179)

* move CreateAccessTokenResponseDTO to api.go

* remove unused types

* run make swagger-clean && make openapi3-gen

pkg/services/cloudmigration/cloudmigrationimpl/cloudmigration_test.go

@@ -10,6 +10,6 @@ import (
 
 func Test_NoopServiceDoesNothing(t *testing.T) {
 	s := &NoopServiceImpl{}
-	_, e := s.MigrateDatasources(context.Background(), &cloudmigration.MigrateDatasourcesRequest{})
+	_, e := s.CreateToken(context.Background())
 	assert.ErrorIs(t, e, cloudmigration.ErrFeatureDisabledError)
 }