[BUGFIX] Don't respect sys_language in Backends getObjectByIdentifier

Since the PropertyMapper (on mapping persisted objects) and
the method findByUid of class Repository uses getObjectByIdentifier to
fetch persisted objects and does not create queries on their own any
more the underlying method in Backend must not respect the sysLanguage
to not break the current behaviour.
Adding this setting seems not having any side effects because the method
was only used by the rewritten PropertyMapper.

Fixes: #47585
Fixes: #47586
Relates: #47251
Releases: 6.2, 6.1
Change-Id: I009f8112dd3d96275930132865c0fe5aeb3835f1
Reviewed-on: https://review.typo3.org/20165
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Wouter Wolters
Reviewed-by: Stefan Neufeind
Reviewed-by: Alexander Schnitzler
Tested-by: Alexander Schnitzler
[TASK] Add latest changes to ChangeLog.txt

Releases: 6.1
Resolves: #47657
Change-Id: I5444e7a5251d6a1bc5dd2ce85269bed702c79e67
Reviewed-on: https://review.typo3.org/20242
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
[TASK] Raise sysext versions to 6.2.0

System extensions are shipped with the same version number as the TYPO3
release they belong with. Also the dependency should be sett accordingly
to make clear they are not to be used with other releases.

Change-Id: Ifb3ba4001a48e40d427da7554bc77b64249c2275
Fixes: #47650
Releases: 6.2
Reviewed-on: https://review.typo3.org/20236
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
[TASK] Reschedule the removal for the old property mapper

The old property mapper will be removed in two versions after 6.1

Resolves: #47664
Releases: 6.2, 6.1
Change-Id: I2a6df4d71f900837797e28dcdedd7539bc936cf5
Reviewed-on: https://review.typo3.org/20256
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring