Merge boxWithStdlib testData into box, delete BoxWithStdlib test

compiler/testData/codegen/box/reflection/mapping/constructor.kt

@@ -0,0 +1,37 @@
+// WITH_REFLECT
+
+import kotlin.reflect.*
+import kotlin.reflect.jvm.*
+
+class K {
+    class Nested
+    inner class Inner
+}
+
+class Secondary {
+    constructor(x: Int) {}
+}
+
+fun check(f: KFunction<Any>) {
+    assert(f.javaMethod == null) { "Fail f method" }
+    assert(f.javaConstructor != null) { "Fail f constructor" }
+    val c = f.javaConstructor!!
+
+    assert(c.kotlinFunction != null) { "Fail m function" }
+    val ff = c.kotlinFunction!!
+
+    assert(f == ff) { "Fail f != ff" }
+}
+
+fun box(): String {
+    check(::K)
+
+    // Workaround KT-8596
+    val nested = K::Nested
+    check(nested)
+
+    check(K::Inner)
+    check(::Secondary)
+
+    return "OK"
+}