Merge topic 'avoid-cmake-cfg-intdir'

2b17b6da6a cmGlobalGenerator: Avoid referencing CMAKE_CFG_INTDIR
f34876561f Tests: Remove or silence instances of ${CMAKE_CFG_INTDIR}
78cf427157 RULE_LAUNCH_*: Add support for generator expressions
cabad8a37f ExternalProject: Always use $<CONFIG> for source files
62e8884d3f CTestTargets: Use $<CONFIG> instead of ${CMAKE_CFG_INTDIR}

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Merge-request: !8169