[!!!][TASK] Move typo3/sysext/core/Build/Scripts to Build/Scripts

This moves all maintenance / check / test scripts from
typo3/sysext/core/Build/Scripts to Build/Scripts.
This is possible now after the test framework extraction.
The artifical Build folder of typo3/sysext/core vanishes and
all core related integrity and code sanitation scripts are
now located next to all other main core build relevant stuff.

This patch is only breaking for core devs who executed one
of the scripts, most notably the "cglFixMyCommit.sh" script.
Path is now:

./Build/Scripts/cglFixMyCommit.sh

Change-Id: I8272d3d18c5e4164d67df8831168476f315db285
Resolves: #79869
Releases: master
Reviewed-on: https://review.typo3.org/51729


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>