[BUGFIX] Avoid double-encoding of delete label

The label for the delete action was encoded twice, leading to text
issues in case special characters are involved. This commit makes use of
`GeneralUtility::implodeAttributes()` to solve this issue properly.

Resolves: #103827
Releases: main, 12.4, 11.5
Change-Id: Ia9f7ba5adf46b470a33b9065e49b8599a24fdfad
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84275


Tested-by: Andreas Kienast <a.fernandez@scripting-base.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Andreas Kienast <a.fernandez@scripting-base.de>