[BUGFIX] Sort most search words by count

The statistic of EXT:indexed_search must be sorted by the count to avoid
stripping of the most used search words.

Resolves: #83062
Releases: master, 9.5
Change-Id: Id8008e0dc3a1ed2a837474fb954930395c80cc12
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63630


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>