Install missing required CMake files for development installs.

VTK doesn't install some of the modularization CMake files since it doesn't
need them when building external libraries, unlike ParaView which does.

Change-Id: Id4eda8c60dbc7c4878916c74b30ea72efebdcd21
Merge topic 'fix_dev_install' into next

d49cbebd Install missing required CMake files for development installs.