[BUGFIX] FollowUp: Fix signal returns for associated signal arguments

[BUGFIX] FollowUp: Fix signal returns for associated signal arguments

Fix broken functional tests. Add a fallback for earlier used associated
returns. Furthermore this patch reintroduces referenced signal arguments
to support old registered slots.

Resolves: #59794
Releases: 6.3, 6.2
Change-Id: Icfe997998476b9bdf77aba280eb87ca42786def8
Reviewed-on: https://review.typo3.org/31073
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel