[BUGFIX] Prevent creating TS setup tree twice

Avoid a second fetch of TS 'setup include tree'
in TypoScriptFrontendController when it just
has been calculated a couple of lines before.

Resolves: #97816
Releases: main, 12.4
Change-Id: If93d796158ffd51b02eefe68ff102fbf0834821f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81899


Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>