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.
- Use typed Wasm tables for each interface method to avoid runtime
function type check
- Use linear search by implemented interface rather than by individual
virtual function signature
The SAM adapter is generate on declaration site. This is different
from the JVM approach.
`external fun interface` is banned for now.
Reusing interface declaration for the adapter is a hack which
reduces code size and makes importing/exporting the adapter
effortless.
Ivan Kylchik