[TASK] Stateless TsConfigTreeBuilder

We can reduce class state by explicitely handing
over runtime state to consuming methods in favor
of parking them on $this.

Resolves: #101804
Releases: main, 12.4
Change-Id: Ic33d619a189625fa9407a3ee36cddf76d0f14d32
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/80691


Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>