This patch simply pulls out the level 2 rules into
a separate configuration file which is a copy of the
original level 2 configuration file of phpstan with
some rules, services and parameters disabled.

Also, additional configuration files are put into the
Build folder and phpstan.neon has been added to the
.gitattributes file.

Releases: master
Resolves: #90789
Change-Id: Ia3b3c30cfa57227c0607904df38add31f36be0e2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63802


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Alexander Schnitzler <git@alexanderschnitzler.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Alexander Schnitzler <git@alexanderschnitzler.de>