[TASK] Remove undocumented setting page.pageHeaderFooterTemplateFile

The TypoScript option "page.pageHeaderFooterTemplate" is removed.

It was introduced in TYPO3 4.5, but never documented,
and is actually overridden by the option "config.pageRendererTemplateFile"
which IS documented, which was also introduced during TYPO3 4.x times.

Both options behave the exact same way.

Resolves: #96322
Releases: main
Change-Id: Ifeec8faec7f28121f3135838bcaa82cac461cb60
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72612


Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Jochen <rothjochen@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Jochen <rothjochen@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>