[BUGFIX] Avoid not closing form in SetupModuleController

The form tag in 'User Settings' is never closed
since that tag is added too late to $this->content.

Resolves: #96645
Releases: main, 11.5
Change-Id: Ief759bce5011fd404c02cbdf35dbfcfe120bc5c2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73159


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>