JS: create new common directory for all generated tests, migrate several tests there

js/js.translator/testData/box/delegateProperty/propertyMetadata.kt

@@ -0,0 +1,35 @@
+package foo
+
+import kotlin.reflect.KProperty
+
+interface WithName {
+    var name: String
+}
+
+class GetPropertyName() {
+    operator fun getValue(withName: WithName, property: KProperty<*>): String {
+        return withName.name + ":" + property.name;
+    }
+    operator fun setValue(withName: WithName, property: KProperty<*>, value: String) {
+        withName.name = value + ":" + property.name
+    }
+}
+
+class A : WithName {
+    override var name = "propertyName"
+    val d = GetPropertyName()
+
+    val a by d
+    var OK by d
+}
+
+fun box(): String {
+    val a = A()
+    if (a.a != "propertyName:a") return "a.a != 'propertyName:a', it: " + a.a
+    if (a.OK != "propertyName:OK") return "a.OK != 'propertyName:aOK', it: " + a.OK
+    a.OK = "property"
+
+    if (a.a != "property:OK:a") return "a.a != 'property:OK:a', it: " + a.a
+
+    return "OK"
+}