Merge boxWithStdlib testData into box, delete BoxWithStdlib test

compiler/testData/codegen/box/jvmOverloads/primaryConstructor.kt

@@ -0,0 +1,10 @@
+// WITH_RUNTIME
+
+class C @kotlin.jvm.JvmOverloads constructor(s1: String, s2: String = "K") {
+    public val status: String = s1 + s2
+}
+
+fun box(): String {
+    val c = (C::class.java.getConstructor(String::class.java).newInstance("O"))
+    return c.status
+}