Merge boxWithStdlib testData into box, delete BoxWithStdlib test

compiler/testData/codegen/box/reflection/enclosing/anonymousObjectInInlinedLambda.kt

@@ -0,0 +1,22 @@
+// WITH_REFLECT
+
+interface A {
+    fun f(): String
+}
+
+inline fun foo(): A {
+    return object : A {
+        override fun f(): String {
+            return "OK"
+        }
+    }
+}
+
+fun box(): String {
+    val y = foo()
+
+    val enclosing = y.javaClass.getEnclosingMethod()
+    if (enclosing?.getName() != "foo") return "method: $enclosing"
+
+    return y.f()
+}