[TASK] Default parameters in ExtensionUtility::registerModule

Adds default parameter array() for controllerActions in registerModule.
This way an own main module group can be added with

\TYPO3\CMS\Extbase\Utility\ExtensionUtility::registerModule(
	'VENDOR.' . $_EXTKEY,
	'newMainGroup'
);

Change-Id: I1218a5069d7787f65e77d1d23a58d307461f7743
Resolves: #54869
Releases: 6.2
Reviewed-on: https://review.typo3.org/26717
Reviewed-by: Christian Kuhn
Reviewed-by: Marcin Sągol
Tested-by: Christian Kuhn
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring