[TASK] Max path length checker

Windows still has a relatively short max path length limitation
in some situation which the core tends to violate.
The patch introduces a test script activated in bamboo to test
the relative path length does not exceed an arbitrary number and
shortens some long path segments.
This allows a statement "If your source / unpack location path
prefix is not longer than x characters, you are fine".

Change-Id: If182fd570c8aec28f1bab9687f2712fc3003b4ed
Resolves: #81968
Releases: master, 8.7
Reviewed-on: https://review.typo3.org/53599


Reviewed-by: Jan Helke <typo3@helke.de>
Tested-by: Jan Helke <typo3@helke.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Tested-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>