### Summary

Since dnf is not installing the packages when running `dnf download --downloadonly...`, it does not require root access to pull down the rpms. It would be nice if ansible followed the same pattern.

### Issue Type

Feature Idea

### Component Name

dnf

### Additional Information

<!--- Paste example playbooks or commands between quotes below -->
```yaml (paste below)
    - name: Download RPM's
      dnf:
        name: "{{ item }}"
        state: present
        download_only: yes
        download_dir: "{{ rpms_path }}"
      loop: "{{ rpms }}"
```


### Code of Conduct

- [X] I agree to follow the Ansible Code of Conduct
self.base.install(pkg_spec)
            return {'failed': False, 'msg': '', 'failure': '', 'rc': 0}
        except dnf.exceptions.MarkingError as e:
            return {
                'failed': True,
                'msg': "No package {0} available.".format(pkg_spec),
                'failure': " ".join((pkg_spec, to_native(e))),
                'rc': 1,
                "results": []
            }
        except dnf.exceptions.DepsolveError as e:
            return {
                'failed': True,
                'msg': "Depsolve Error occurred for package {0}.".format(pkg_spec),
                'failure': " ".join((pkg_spec, to_native(e))),
                'rc': 1,
                "results": []
            }
        except dnf.exceptions.Error as e:
            if to_text("already installed") in to_text(e):
                return {'failed': False, 'msg': '', 'failure': ''}
            else:
                return {
                    'failed': True,
                    'msg': "Unknown Error occurred for package {0}.".format(pkg_spec),
                    'failure': " ".join((pkg_spec, to_native(e))),
                    'rc': 1,
                    "results": []
                }
    def _whatprovides(self, filepath):