### Apache Airflow version

2.7.0rc2

### What happened

In the Airflow UI, currently, the DAG Processor is visible in the Cluster Activity page even if there is no stand-alone dag processor. 

### What you think should happen instead

It should be hidden if there is no stand-alone dag processor.

### How to reproduce

Run Airflow 2.7 

### Operating System

Mac OS

### Versions of Apache Airflow Providers

Airflow > 2.7

### Deployment

Official Apache Airflow Helm Chart

### Deployment details

_No response_

### Anything else

_No response_

### Are you willing to submit PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

xcom_query = session.scalars(
            select(XCom).where(
                XCom.dag_id == dag_id,
                XCom.task_id == task_id,
                XCom.execution_date == dttm,
                XCom.map_index == map_index,
            )
        )
        attributes = [(xcom.key, xcom.value) for xcom in xcom_query if not xcom.key.startswith("_")]
        title = "XCom"
        return self.render_template(
            "airflow/xcom.html",
            show_trigger_form_if_no_params=conf.getboolean("webserver", "show_trigger_form_if_no_params"),
            attributes=attributes,
            task_id=task_id,
            execution_date=execution_date,
            map_index=map_index,
            form=form,
            root=root,
            dag=dag,
            title=title,
        )
    @expose("/delete", methods=["POST"])
    @auth.has_access(
        [
            (permissions.ACTION_CAN_DELETE, permissions.RESOURCE_DAG),
        ]
    )
    @action_logging
    def delete(self):