[BUGFIX] Respect richtextConfiguration set via TCA

If richtextConfiguration is set via TCA for a specific text field
(e.g. for custom elements or within TCA-overrides),
respect the richtextConfiguration and prefer it over the general
RTE.default.preset

Removed 'richtextConfiguration' => 'default' from tt_content, since it is obsolete and breaks the logic of fallback.

New fallback order:
1. preset defined for a specific field via PageTS
2. richtextConfiguration defined for a specific field via TCA
3. general preset defined via PageTS
4. default

Resolves: #88655
Releases: master
Change-Id: I54271732ba862be4c05ccf62352ee685d72fb985
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61193


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Benni Mack <benni@typo3.org>