[TASK] Remove wrong deprecation in extbase persistence

A method was misleadingly deprecated in QueryInterface.
Also an additional hint was added to the other deprecated
methods.

Resolves: #57277
Releases: 6.2
Change-Id: If80c707f1f65637682d5592116aaecb1a1e5918e
Reviewed-on: https://review.typo3.org/28754
Reviewed-by: Alexander Opitz
Tested-by: Alexander Opitz
Reviewed-by: Markus Klein
Tested-by: Markus Klein