Fix Extended2023Pixel

Extended2023Pixel references some files in BarrelEndcap5D despite having the extended pixel detector.  This fixes the 136xx tests.  There are still two BarrelEndcap5D files used - BarrelEndcap5D/pixbar.xml and BarrelEndcap5D/tracker.xml.  After discussion with @boudoul, it seems these two files are shared between both detectors.