[BUGFIX] EXT:tstemplate: Removed double escaping of page name

Because the escaping takes place when the PageZero template is rendered
by the view, there is no need to escape it in the controller.

Resolves: #79096
Resolves: #79060
Releases: master
Change-Id: I3e06e2829e0d1d916b941329f835b4e7f5e29398
Reviewed-on: https://review.typo3.org/51046


Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>