JS: prevent optimizer from removing access to dynamic property access. See KT-15278

js/js.translator/testData/box/dynamic/propertySideEffect.js

@@ -0,0 +1,10 @@
+var log = "";
+
+function C() {
+}
+Object.defineProperty(C.prototype, "foo", {
+    "get" : function () {
+        log += "foo called";
+        return "OK"
+    }
+});

js/js.translator/testData/box/dynamic/propertySideEffect.kt

@@ -0,0 +1,13 @@
+external class C
+
+inline val C.foo: String
+    get() = asDynamic().foo
+
+external val log: String
+
+fun box(): String {
+    val c = C()
+    c.foo
+    if (log != "foo called") return "fail: $log"
+    return "OK"
+}