[FEATURE] stdWrap for list of results

Adding the TS property
plugin.tx_indexedsearch.resultlist_stdWrap -> stdWrap
which allows passing the list of results through stdWrap

Resolves: #16386
Releases: 6.2
Change-Id: I9b17b0036d21e880747d7d03a58349969c87effb
Reviewed-on: https://review.typo3.org/20192
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind