[BUGFIX] Readd missing initialisation of $tsfe

During the refactoring of #85543 a line too much has been removed.
Readd the initialisation of $tsfe.

Resolves: #86223
Releases: master
Change-Id: Icd7bf93fe1d04e845b4a8cc497f171c7429d0d55
Reviewed-on: https://review.typo3.org/58252


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Josef Glatz <josef.glatz@typo3.org>
Tested-by: Josef Glatz <josef.glatz@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>