Migrate boxInline tests to new multi-file framework

compiler/testData/codegen/boxInline/callableReference/constructor.kt

@@ -0,0 +1,20 @@
+// FILE: 1.kt
+
+package test
+
+class A(val z: Int) {
+    fun calc() = z
+}
+
+inline fun call(p: Int, s: (Int) -> A): Int {
+    return s(p).z
+}
+
+// FILE: 2.kt
+
+import test.*
+
+fun box() : String {
+    val call = call(11, ::A)
+    return if (call == 11) "OK" else "fail"
+}