[TASK] Improve performance of Fluid TemplatePaths

This patch improves the performance of TemplatePaths
in two ways:

* GeneralUtility::removeDotsFromTS() is called on a far
  smaller array instead of all TypoScript.
* Fallback paths are allowed to be cached in the runtime
  cache which avoids re-reading TypoScript when no
  paths are configured in TS.

Saves several thousand calls to removeDotsFromTs
which in turn saves several tens of thousands of calls
to in_array.

Change-Id: Ib8aef69dc9136d355441ac05f21fe391e524eacc
Resolves: #82232
Releases: master, 8.7
Reviewed-on: https://review.typo3.org/53824


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Wolfgang Klinger <wolfgang@wazum.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>