Migrate boxInline tests to new multi-file framework

compiler/testData/codegen/boxInline/reified/kt9637.kt

@@ -0,0 +1,36 @@
+// FILE: 1.kt
+
+package test
+
+import java.util.*
+import kotlin.reflect.KClass
+
+val valuesInjectFnc = HashMap<KClass<out Any>, Any>()
+
+inline fun <reified T : Any> injectFnc(): Lazy<Function0<T>> = lazy(LazyThreadSafetyMode.NONE) {
+    (valuesInjectFnc[T::class] ?: throw Exception("no inject ${T::class.simpleName}")) as Function0<T>
+}
+
+inline fun <reified T : Any> registerFnc(noinline value: Function0<T>) {
+    valuesInjectFnc[T::class] = value
+}
+
+public class Box
+
+// FILE: 2.kt
+
+//NO_CHECK_LAMBDA_INLINING
+import test.*
+
+class Boxer {
+    val box: () -> Box by injectFnc()
+}
+
+fun box(): String {
+    val box = Box()
+    registerFnc { box }
+    val prop = Boxer().box
+    if (prop() != box) return "fail 1"
+
+    return "OK"
+}