[balooctl] Use new helper for simple format output

Summary:
Symlinks are no longer reported as "Basic indexing scheduled",
otherwise the output is unchanged.

Depends on D20617.

Test Plan: balooctl status -f simple <file>

Reviewers: Baloo, Frameworks, ngraham, astippich, poboiko

Reviewed By: Baloo, ngraham

Subscribers: kde-frameworks-devel

Tags: Frameworks, Baloo

Differential Revision: https://phabricator.kde.org/D20618