[TASK] Make internal Fluid classes strict

Resolves: #100373
Releases: main
Change-Id: I26b0a7a888d99a4bba6d9cc77184bff6589edab8
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78347


Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>

typo3/sysext/fluid/Classes/Core/Cache/FluidTemplateCache.php

 <?php
 
+declare(strict_types=1);
+
 /*
  * This file is part of the TYPO3 CMS project.
  *

typo3/sysext/fluid/Classes/Core/ViewHelper/ViewHelperResolver.php

 <?php
 
+declare(strict_types=1);
+
 /*
  * This file is part of the TYPO3 CMS project.
  *

typo3/sysext/fluid/Classes/View/TemplatePaths.php

 <?php
 
+declare(strict_types=1);
+
 /*
  * This file is part of the TYPO3 CMS project.
  *