[BUGFIX] Process large uid lists in chunks in RelationHandler

Uid lists in the relation handler can be very big. To avoid exceeding
query limits like maximum number of placeholder per query or the max
allowed statement length these large lists are split into chunks of
safe length before processing.

Change-Id: I176acb85feb91c6162a77016c1918cf5a992625c
Resolves: #81555
References: #80875
Releases: master, 8.7
Reviewed-on: https://review.typo3.org/53193


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Manuel Selbach <manuel_selbach@yahoo.de>
Tested-by: Manuel Selbach <manuel_selbach@yahoo.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>