[TASK] Update typo3fluid/fluid to 2.5.1

- Allows any protocol or wrapper for template sources
- Ignores empty path specifications

composer command used:
composer update typo3fluid/fluid

Resolves: #84095
Releases: master, 8.7
Change-Id: I52380fe465b112df73ab86c570f6a12d2eedf4d3
Reviewed-on: https://review.typo3.org/55956


Tested-by: TYPO3com <no-reply@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>