[BUGFIX] Do not apply stdWrap on USER_INT

When converting a USER to USER_INT ContentObject
the stdWrap is now executed only once instead
of multiple times.

Resolves: #61441
Releases: master, 9.5
Change-Id: Ia36dfffeb3721acc244a74fc559030e94439d10d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/60463


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>