[TASK] Set clearCacheOnLoad = 1 to ext_emconf.php

Change-Id: I085d0c73f3cd39427284348f72b566018d6728f6
Resolves: #58793, #58784
Reviewed-on: https://review.typo3.org/30094
Reviewed-by: Peter Kraume
Tested-by: Peter Kraume
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer