Merge topic 'test-launcher-emulator-genex'

13ece67a58 Add genex support to TEST_LAUNCHER and CROSSCOMPILING_EMULATOR
b9ad73fcb2 cmTestGenerator: De-duplicate TEST_LAUNCHER and CROSSCOMPILING_EMULATOR impl

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !9198