[TASK] Program to cache frontend interface, not implementations

Instead of annotating and type-hinting specific cache
frontend implementations, TYPO3 should program to
the FrontendInterface instead. This patch corrects that.

Change-Id: Ibc8d31cf78459e700ab9fe3448a53cbe83bccc61
Resolves: #81461
References: #81432
Releases: master
Reviewed-on: https://review.typo3.org/53116


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Tested-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>