This feature is not needed because it is unconditionally disabled for K1
(because of not fully correct implementation) and unconditionally enabled
in K2 (K2 does not support old behavior)
^KT-38895
We are going to deprecate `WITH_RUNTIME` directive. The main reason
behind this change is that `WITH_STDLIB` directive better describes
its meaning, specifically it will add kotlin stdlib to test's classpath.