[MM-35861] Add missing migration transformation (#17647)

model/migration.go

@@ -32,6 +32,7 @@ const (
 	MIGRATION_KEY_ADD_SITE_SUBSECTION_PERMISSIONS             = "site_subsection_permissions"
 	MIGRATION_KEY_ADD_ENVIRONMENT_SUBSECTION_PERMISSIONS      = "environment_subsection_permissions"
 	MIGRATION_KEY_ADD_REPORTING_SUBSECTION_PERMISSIONS        = "reporting_subsection_permissions"
+	MIGRATION_KEY_ADD_TEST_EMAIL_ANCILLARY_PERMISSION         = "test_email_ancillary_permission"
 	MIGRATION_KEY_ADD_ABOUT_SUBSECTION_PERMISSIONS            = "about_subsection_permissions"
 	MIGRATION_KEY_ADD_INTEGRATIONS_SUBSECTION_PERMISSIONS     = "integrations_subsection_permissions"
 )