COMP: Propagate cmake variable Slicer_QTSCRIPTEDMODULES_DISABLED

to the Slicer inner build configuration.

It originally was a typo: eq_superbuild_extra_args instead of
ep_superbuild_extra_args which was latter replaced into
EXTERNAL_PROJECT_OPTIONAL_ARGS

git-svn-id: http://svn.slicer.org/Slicer4/trunk@22706 3bd1e089-480b-0410-8dfb-8563597acbee