Merge topic 'FILE_SET-SOURCES'

c386aaebf8 FILE_SET: install and export SOURCES file set type
5c5b68f44e FILE_SET: Add support for the SOURCES type
5697bcced0 BT<> and cmLocalGenerator: Add helpers functions
42ca2a2062 cmEvaluatedTargetProperty: put declarations in namespace cm

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !11863