### 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)

"""Iterate through provider-backed connection fields.
        Note that this cannot be a property (including a cached property)
        because Flask-Appbuilder attempts to access all members on startup, and
        using a property would initialize the providers manager too eagerly.
        Returns tuple of:
        * key
        * field_name
        * whether the field is sensitive
        """
        return (
            (k, v.field_name, v.is_sensitive) for k, v in ProvidersManager().connection_form_widgets.items()
        )
    @property
    def add_columns(self) -> list[str]:
        """A list of columns to show in the Add form.
        This dynamically calculates additional fields from providers and add
        them to the backing list. This calculation is done exactly once (by
        checking we're referencing the class-level variable instead of the
        instance-level), and only after we enter the request context (to skip
        superfuluous checks done by Flask-Appbuilder on startup).
        """
        if self._add_columns is type(self)._add_columns and has_request_context():
            self._add_columns = [
                *self._add_columns,
                *(k for k, _, _ in self._iter_extra_field_names_and_sensitivity()),
            ]
        return self._add_columns
    @property
    def edit_columns(self) -> list[str]: