[TASK] Comment out bleeding edge phpstan configuration

Bleeding edge configuration may be useful to use
but shouldn't be enabled by default. To make the
inclusion convenient, the include has only be
commented and not be removed at all.

Releases: master
Resolves: #90403
Change-Id: I9a8dfdef29947df890db92d331f1b4b27d13b736
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63277


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>