[TASK] Deprecate TSFE->initTemplate

The method only does one line of code, and is now instantiated if needed.

Resolves: #85666
Releases: master
Change-Id: Id5df0ecb3f887743ea1167829c9cca69aef501e4
Reviewed-on: https://review.typo3.org/57693


Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>