Merge boxWithStdlib testData into box, delete BoxWithStdlib test

compiler/testData/codegen/box/reflection/call/innerClassConstructor.kt

@@ -0,0 +1,10 @@
+// WITH_REFLECT
+
+class A {
+    class Nested(val result: String)
+    inner class Inner(val result: String)
+}
+
+fun box(): String {
+    return (A::Nested).call("O").result + (A::Inner).call((::A).call(), "K").result
+}