[TASK] Remove XCLASS definitions from cache classes

With #28063 many core cache classes are required directly during bootstrap.
This makes XCLASS impossible since those base classes are not instantiated
with t3lib_div::makeInstance() anymore. t3lib_cache is static and can not be
XCLASSED. The caching framework has a built-in feature to register and use own
implementations. The patch removes all XCLASS definitions of cache classes.

Change-Id: I1e624bb769b899a14491aa3ee1cca9da480ebfb6
Resolves: #28221
Related: #28063
Reviewed-on: http://review.typo3.org/3340
Reviewed-by: Stefan Neufeind
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn