JS: replace noImpl with definedExternally in tests

compiler/testData/diagnostics/testsWithJsStdLib/native/unusedParam/nativeSetter.kt

@@ -1,18 +1,18 @@
 // !DIAGNOSTICS: -DEPRECATION
 @nativeSetter
-fun Int.foo(a: String, v: Int): Int = noImpl
+fun Int.foo(a: String, v: Int): Int = definedExternally
 
 external class Bar(b: Int, c: Char) {
     @nativeSetter
-    fun baz(d: Int, v: Int) { noImpl }
+    fun baz(d: Int, v: Int) { definedExternally }
 }
 
 external object Obj {
     @nativeSetter
-    fun test1(e: String, v: Any) { noImpl }
+    fun test1(e: String, v: Any) { definedExternally }
 
     object Nested {
         @nativeSetter
-        fun test2(g: Int, v: Any) { noImpl }
+        fun test2(g: Int, v: Any) { definedExternally }
     }
 }