Migrate boxInline tests to new multi-file framework

compiler/testData/codegen/boxInline/reified/kt11081.kt

@@ -0,0 +1,43 @@
+// FILE: 1.kt
+
+package test
+
+open class TypeRef<T> {
+    val type = target()
+
+    private fun target(): String {
+        val thisClass = this.javaClass
+        val superClass = thisClass.genericSuperclass
+
+        return superClass.toString()
+    }
+}
+
+
+
+inline fun <reified T> typeWithMessage(message: String = "Hello"): String {
+    val type = object : TypeRef<T>() {}
+    val target = type.type
+
+    return message + " " + target
+}
+
+// FILE: 2.kt
+
+import test.*
+
+fun specifyOptionalArgument() = typeWithMessage<List<Int>>("Hello")
+
+fun useDefault() = typeWithMessage<List<Int>>()
+
+fun box(): String {
+    val specifyOptionalArgument = specifyOptionalArgument()
+    val useDefault = useDefault()
+
+    if (useDefault != specifyOptionalArgument) return "fail: $useDefault != $specifyOptionalArgument"
+
+    val type = typeWithMessage<List<Int>>("")
+    if (type != " test.TypeRef<java.util.List<? extends java.lang.Integer>>") return "fail 2: $type"
+
+    return "OK"
+}