[TASK] Deprecate lowerCamelCase options of EXT:impexp commands

Adapting the "impexp:export" and "impexp:import" commands to
the TYPO3 Core and replacing all lowerCamelCase options with
lowercase options. The lowerCamelCase options will be removed
in TYPO3 v12.

Perform explicit instead of implicit command argument testing
to tackle the increased complexity introduced by the handling
of deprecated and future-proof arguments.

Align naming of command options "pid" and "pageId"

Align some command option descriptions.

Resolves: #94902
Releases: master
Change-Id: Ibd30a89e6ba81f27753979da944bde4d104aeb95
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70599


Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Alexander Nitsche <typo3@alexandernitsche.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Alexander Nitsche <typo3@alexandernitsche.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>