Merge topic 'build-local-interface-genex'

38cbf5e15b Genex: Add $<BUILD_LOCAL_INTERFACE:...> genex
37b5c78688 cmGeneratorExpression: Refactor stripExportInterface() to use enum class

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !7919