Migrate boxInline tests to new multi-file framework

compiler/testData/codegen/boxInline/complex/use.kt

@@ -0,0 +1,65 @@
+// FILE: 1.kt
+
+package test
+
+public class Data()
+
+public class Input(val d: Data) : Closeable {
+    public fun data() : Int = 100
+}
+public  class Output(val d: Data) : Closeable {
+    public fun doOutput(data: Int): Int = data
+}
+
+public interface Closeable {
+    open public fun close() {}
+}
+
+public inline fun <T: Closeable, R> T.use(block: (T)-> R) : R {
+    var closed = false
+    try {
+        return block(this)
+    } catch (e: Exception) {
+        closed = true
+        try {
+            this.close()
+        } catch (closeException: Exception) {
+
+        }
+        throw e
+    } finally {
+        if (!closed) {
+            this.close()
+        }
+    }
+}
+
+
+public fun Input.copyTo(output: Output, size: Int): Long {
+    return output.doOutput(this.data()).toLong()
+}
+
+// FILE: 2.kt
+
+import test.*
+
+
+fun Data.test1(d: Data) : Long  {
+    val input2 = Input(this)
+    val input = Input(this)
+    return input.use<Input, Long>{
+        val output = Output(d)
+        output.use<Output,Long>{
+            input.copyTo(output, 10)
+        }
+    }
+}
+
+
+fun box(): String {
+
+    val result = Data().test1(Data())
+    if (result != 100.toLong()) return "test1: ${result}"
+
+    return "OK"
+}