Runs structured typed Java interop cases against an executable oracle.
mix ptc.java_conformance --oracle jvm --subset implemented
mix ptc.java_conformance --oracle babashka --subset fast
mix ptc.java_conformance --oracle ptc --subset closed-dispatch
mix ptc.java_conformance --oracle ptcJVM Clojure is authoritative for descriptors. Babashka is a fast secondary signal and cannot grant overload coverage.