Important: #105538 - list_type and sub types

See forge#105538

Description

Due to the removal of the plugin content element ( list) and the corresponding plugin subtype field list_type the fifth parameter $pluginType of ExtensionUtility::configurePlugin() is now unused and can be omitted. It is only kept for backwards compatibility. However, be aware that passing any value other than CType will trigger a \InvalidArgumentException.

Please also note that due to the removal of the list_type field in tt_content, passing list_type as second parameter $field to ExtensionManagementUtility::addTcaSelectItemGroup() will now - as for any other non-existent field - trigger a \RuntimeException.