[!!!][TASK] Remove database fields related to CSS Styled Content

The following database fields from "tt_content" have been removed:

* tt_content.spaceBefore (now used via space_before_class)
* tt_content.spaceAfter (now used via space_after_class)

Resolves: #88744
Releases: master
Change-Id: I2da1645b94b68fadb2945c2f1708809e2e9cbab4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61286


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>