The Extbase query cache stresses the database by querying
the same cache identifier over and over again. This for example
doubles the amount of fired database queries for fetching related
objects at the moment.

Introduce a first level cache saving the cache entries during
runtime.

Resolves: #57275
Releases: 6.2
Change-Id: I964db7c9ab8b61a3d8ac6534a35dc65240398aa7
Reviewed-on: https://review.typo3.org/28744
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Reviewed-by: Philipp Gampe
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel