[TASK] Replace bool properties in ClassSchema with a BitSet

Instead of using multiple properties that hold bool flags,
ClassSchema now holds all flags in a single BitSet property.

This drastically reduces the size of the class schemata cache
file, as a lot of properties no longer need to be serialized.

Releases: master
Resolves: #87631
Change-Id: I12b2d8a2f4e481d55b1f57ce00bfede599b4cb32
Reviewed-on: https://review.typo3.org/c/59626


Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>