[TASK] Extend Regular DataHandler functional tests

* add third tt_content element with localization in live context
* add new tt_content delete placeholder in different workspace
* populate changes to all scenarios in live and workspace context

Releases: 6.2, 6.3
Resolves: #59881
Change-Id: I644e264048a5c33c0a613d5f8440975cabd40721
Reviewed-on: https://review.typo3.org/31141
Reviewed-by: Oliver Hader
Tested-by: Oliver Hader
[CLEANUP] Reformat IRRE JS code

This is an automatic reformat performed by PhpStorm, to get rid of some
ugly constructs like one-line inline methods.

Change-Id: Id24666c673b3822916f9c5233c0b34ce7d38e7aa
Related: #58475
Releases: 6.3
Reviewed-on: https://review.typo3.org/29833
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Reviewed-by: Andreas Wolf
Tested-by: Andreas Wolf
[CLEANUP] Final cleanup of TCA Overrides

Some of the files still miss the die statement in
the first line. To be consistent, add it to every
file.

One file had a check for TYPO3_MODE === BE which
is wrong in these files because the result is
cached.

If the first hit with empty cache is done in a FE
request, a wrong result would be cached.

Releases: 6.2, 6.3
Resolves: #60317
Change-Id: I839499100da28ba11d5dcbf81fde87b30b61de81
Reviewed-on: https://review.typo3.org/31621
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Markus Klein <klein.t3@mfc-linz.at>
Tested-by: Markus Klein <klein.t3@mfc-linz.at>