### Apache Airflow version

2.5.0

### What happened

In [Airflow 2.4.0](https://github.com/apache/airflow/blob/main/RELEASE_NOTES.rst#airflow-240-2022-09-19), a new feature was added that added an option to mask sensitive data in UI configuration page ([PR](https://github.com/apache/airflow/pull/25346)). I have set `AIRFLOW__WEBSERVER__EXPOSE_CONFIG` as `NON-SENSITIVE-ONLY`.

The feature is working partially as the `airflow.cfg` file display only has [sensitive configurations](https://github.com/apache/airflow/blob/2.5.0/airflow/configuration.py#L149-L160) marked as `< hidden >`. However, the `Running Configuration` table below the file display has all configuration set via environment variables marked as `< hidden >` which I believe is unintended.

I did not change `airflow.cfg` so the value here is displaying the default value of `False` as expected.

![Screen Shot 2023-01-05 at 1 39 11 PM](https://user-images.githubusercontent.com/5952735/210891805-1a5f6a6b-1afe-4d05-b03d-61ac583441fc.png)

The value for `expose_config` I expect to be shown as `NON-SENSITIVE-ONLY` but it shown as `< hidden >`.

![Screen Shot 2023-01-05 at 1 39 27 PM](https://user-images.githubusercontent.com/5952735/210891803-dba826d4-2d3c-4781-aeae-43c46e31fa89.png)


### What you think should happen instead

As mentioned previously, the value for `expose_config` I expect to be shown as `NON-SENSITIVE-ONLY`.

Only the [sensitive variables](https://github.com/apache/airflow/blob/2.5.0/airflow/configuration.py#L149-L160) should be set as `< hidden >`.

### How to reproduce

Set an Airflow configuration through the environment variable and check on the Configuration page.

### 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)

self, section: str, key: str, fallback=_UNSET, **kwargs
    ) -> dict | list | str | int | float | None:
        """
        Return a config value parsed from a JSON string.
        ``fallback`` is *not* JSON parsed but used verbatim when no config value is given.
        """
        
        
        default = _UNSET
        if fallback is not _UNSET:
            default = fallback
            fallback = _UNSET
        try:
            data = self.get(section=section, key=key, fallback=fallback, _extra_stacklevel=1, **kwargs)
        except (NoSectionError, NoOptionError):
            return default
        if not data:
            return default if default is not _UNSET else None
        try:
            return json.loads(data)
        except JSONDecodeError as e:
            raise AirflowConfigException(f"Unable to parse [{section}] {key!r} as valid json") from e
    def gettimedelta(