[BUGFIX] Use new paths for tstemplate classes

TsTemplate classes have been moved into a central directory.
All uses of the classes now have the right new directory.

Resolves: #49993
Releases: 6.2
Change-Id: I3b3168b0550d704ef2388304be30bac961e371f9
Reviewed-on: https://review.typo3.org/22273
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Max Roesch
Tested-by: Max Roesch
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn