[!!!][TASK] Consolidate extbase caches

The caches of extbase have been consolidated as both of them shared the
same caching frontend. Cache identifiers `extbase_reflection` and
`extbase_datamapfactory_datamap` do no longer exist.

A single cache `extbase` is pre-configured and used for class schemata
and data maps instead.

Releases: master
Resolves: #87558
Change-Id: I4d7ec53cfd1b4900998fa2d01db1d8f2c1730633
Reviewed-on: https://review.typo3.org/59573


Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Reviewed-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Tested-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>