[FEATURE] Show pid field in sys_action task

All explicitly defined fields of a sql task are now being rendered.

Resolves: #44287
Releases: master
Change-Id: Ie1e57e55ec440aecbe5a526cefc489adef606fec
Reviewed-on: http://review.typo3.org/20980
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>