Kotlin: Add a Kotlin 2 copy of the testsuite

java/ql/test-kotlin2/library-tests/java_and_kotlin/Java.java

@@ -0,0 +1,23 @@
+import kotlin.coroutines.Continuation;
+
+public class Java {
+	void javaFun() {
+		new Kotlin().kotlinFun();
+	}
+
+	public class Djava extends Base {
+		@Override
+		public String fn0(int x) {
+			return super.fn0(x);
+		}
+
+/*
+// Java interop disabled as it currently doesn't work (no symbol fn1(int, Completion<...>) gets created)
+// TODO: re-enable this test once a correct function signature is extracted
+		@Override
+		public Object fn1(int x, Continuation<? super String> $completion) {
+			return super.fn1(x, $completion);
+		}
+*/
+	}
+}