[BUGFIX] Align styling of panel headings in admin tool modals

In the submodules of the admin tools, information and configuration
options are placed in modals. Some of the panel headings used there
did not match the style of other panel headings used in the system.
The patch now aligns the styling.

Resolves: #104087
Releases: main, 12.4
Change-Id: I15b8e447772c67b3627ba42cab1356cd59ab4274
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84683


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Reviewed-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Michael Telgkamp <michael.telgkamp@mindscreen.de>
Tested-by: Michael Telgkamp <michael.telgkamp@mindscreen.de>