[FEATURE] query: Allow setting fieldList via TypoScript

Allow setting the list of fields (parameter "fl") to return from
Solr. If not set, this currently defaults to "*,score".

Change-Id: I46761e3914059feeb338226c73140fdc9bab0696
Resolves: #54524
Reviewed-on: https://review.typo3.org/26504
Reviewed-by: Hans Höchtl
Tested-by: Hans Höchtl
Tested-by: Stefan Neufeind
Reviewed-by: Ingo Renner
Tested-by: Ingo Renner