Fix issue console error when navigating to document type template tab (#19913)

Co-authored-by: Lan Nguyen Thuy <lnt@umbraco.dk>

src/Umbraco.Web.UI.Client/src/packages/templating/templates/global-components/input-template/input-template.element.ts

@@ -101,7 +101,7 @@ export class UmbInputTemplateElement extends UUIFormControlMixin(UmbLitElement,
 	}
 
 	protected override getFormElement() {
-		return this;
+		return undefined;
 	}
 
 	#appendTemplates(unique: string[]) {