[perl #54374] [BUG]: Warning being emitted when harness runs t/steps/inter_libparrot-*.t

The tests needed a bit more information to adapt to the change described
above in config/inter/libparrot.pm.

The patch attached fixes the tests.  If there is no objection I'll apply
it within 24 hours.

• [perl #54374] [BUG]: Warning being emitted when harness runs t/steps/inter_libparrot-*.t by James Keenan via RT
• [perl #54374] [BUG]: Warning being emitted when harness runs t/steps/inter_libparrot-*.t by James Keenan via RT
• [perl #54374] [BUG]: Warning being emitted when harness runs t/steps/inter_libparrot-*.t by James Keenan