Remove "extbase.controllerExtensionName = cookieman"

[derhansen]

For the TYPO3 v12 version of the extension, the TypoScript Setting extbase.controllerExtensionName = cookieman can be removed, since it should not be used any more (see https://docs.typo3.org/m/typo3/reference-typoscript/12.4/en-us/ContentObjects/Fluidtemplate/Index.html#confval-fluidtemplate-extbase-controllerextensionname) and may lead to unwanted side effects when an extbase controller actions throws a PropagateResponseException

[jonaseberle]

Thanks, it used to allow to omit extensionName from {f:translate(key: 'heading', extensionName: 'cookieman')} but that was undocumented before and I had to explicitly add it to the v12 f:translate Viewhelpers anyways.

I'll incorporate that.