FIR2IR don't generate delegates for default interface members

compiler/testData/codegen/box/jvm8/defaults/delegationBy/javaDefaultMethod.kt

@@ -0,0 +1,24 @@
+// TARGET_BACKEND: JVM
+// JVM_TARGET: 1.8
+// WITH_STDLIB
+
+// FILE: javaDefaultMethod.kt
+
+class JImpl : J {
+    override fun getO() = "fail"
+    override fun getK() = "K"
+}
+
+class Test : J by JImpl()
+
+fun box() =
+    Test().getO() + Test().getK()
+
+// FILE: J.java
+public interface J {
+    default String getO() {
+        return "O";
+    }
+
+    String getK();
+}