Migrate boxInline tests to new multi-file framework

compiler/testData/codegen/boxInline/innerClasses/innerLambda.kt

@@ -0,0 +1,32 @@
+// FILE: 1.kt
+
+package test
+
+inline fun foo1() = run {
+    {
+        "OK"
+    }
+}
+
+var sideEffects = "fail"
+
+inline fun foo2() = run {
+    {
+        Runnable {
+            sideEffects = "OK"
+        }
+    }
+}
+
+// FILE: 2.kt
+
+import test.*
+
+fun box(): String {
+    val x1 = foo1()()
+    if (x1 != "OK") return "fail 1: $x1"
+
+    foo2()().run()
+
+    return test.sideEffects
+}