[Test] Move KotlinAgainstKotlin tests under BlackBoxCodegen tests

compiler/testData/codegen/box/compileKotlinAgainstKotlin/defaultConstructor.kt

@@ -0,0 +1,14 @@
+// MODULE: lib
+// FILE: A.kt
+
+package aaa
+
+class A(val a: Int = 1)
+
+// MODULE: main(lib)
+// FILE: B.kt
+
+fun box(): String {
+    aaa.A()
+    return "OK"
+}