[TASK] Drop JavaScript function `jumpSelf`

The JavaScript function `jumpSelf` is only used to some clipboard actions.
Moving the links to a regular `href` has the same effect, rendering this
very function useless.

Resolves: #88857
Releases: master
Change-Id: I3ef6e9c7bcbeb214cc24286c3bd4e9eb3dd8835f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61388


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Jonas Eberle <flightvision@googlemail.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Jonas Eberle <flightvision@googlemail.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>