Merge topic 'test-iar'

a772c2c384 Tests/RunCMake/IAR: Extend tests to actually build
9f52953df5 Tests/RunCMake/IAR: Enable IAR extended keywords
cc268d58e2 Tests/RunCMake/IAR: Update architecture-specific link flags
bcddea5041 Tests/RunCMake/IAR: Simplify test project cmake code

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !9240