[TASK] CSC: Do not show pageTS template if it's included by default

If the extension css_styled_content is configured to include the
pageTS by default, there is no need to show the template in the
page resources.

Resolves: #71639
Releases: master
Change-Id: I3816e8030ea01c6239dcdc0f7a178b64989c6633
Reviewed-on: https://review.typo3.org/44762


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Josef Glatz <josef.glatz@typo3.org>
Tested-by: Josef Glatz <josef.glatz@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>