Bug 474355 - generics varargs problem - ecj behavior differs from javac

Bringing forward https://bugs.eclipse.org/bugs/show_bug.cgi?id=474355 to GitHub tracker.

Problem on the reporter snippet still exists on master.

```
import java.lang.Object;
import java.util.*;

public class GenericVarargsBug {

public static void main(String... args) {
List sth = new ArrayList<>();
sth.add(new byte[]{23, 23});
isItWorking(sth.get(0));
}

private static void isItWorking(Object... os) {
System.out.println("yes");
}
}
```

This program at run time generates a CCE with ECJ generated code but prints yes when compiled with javac.

However the snippet from https://bugs.eclipse.org/bugs/show_bug.cgi?id=474355#c2 generates a CCE with javac generated code also (JDK 24)