[BUGFIX] Allow be.container ViewHelper without Base Header Bar

Due to the replacment of DocumentTemplate with ModuleTemplate
the rendering is now different. In order to overcome this,
a new flag enableDocHeader is added.

see https://review.typo3.org/c/Packages/TYPO3.CMS/+/63290

Resolves: #90834
Releases: master
Change-Id: Ifb278f7dff1c9b1e18b09f7587dbe33caff13732
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64261


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>