[TASK] Avoid TypoScriptParser for string snippets

There are a couple of places in the core care
that parse a TypoScript a-like syntax.
The patch switches them to the new TypoScript
parser by adding a factory class that is
able to parse single string snippets.

Resolves: #99114
Related: #97816
Releases: main
Change-Id: I2292e90bbdd7ea16ad48b4b7811f9935f4a51196
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76659


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