[Test] Convert IGNORE: NATIVE directives in box tests from A to C

^KT-59057

Merge-request: KT-MR-10747
Merged-by: Vladimir Sukharev <Vladimir.Sukharev@jetbrains.com>

compiler/testData/codegen/box/casts/functions/isFunKSmallJS.kt

@@ -0,0 +1,46 @@
+// TARGET_BACKEND: JS
+// TARGET_BACKEND: JS_IR
+// TARGET_BACKEND: JS_IR_ES6
+// WITH_REFLECT
+
+fun fn0() {}
+fun fn1(x: Any) {}
+
+val lambda0 = {} as () -> Unit
+val lambda1 = { x: Any -> } as (Any) -> Unit
+
+fun Any.extFun() {}
+
+var Any.extProp: String
+        get() = "extProp"
+        set(x: String) {}
+
+class A {
+    fun foo() {}
+}
+
+fun box(): String {
+    val f0 = ::fn0 as Any
+    val f1 = ::fn1 as Any
+
+    val ef = Any::extFun as Any
+
+    val afoo = A::foo
+
+    fun local0() {}
+    fun local1(x: Any) {}
+
+    val localFun0 = ::local0 as Any
+    val localFun1 = ::local1 as Any
+
+    if (f0 !is Function1<*, *>) return "Failed: f0 is Function1<*, *>"
+    if (f1 !is Function0<*>) return "Failed: f1 is Function0<*>"
+
+    if (lambda0 !is Function1<*, *>) return "Failed: lambda0 is Function1<*, *>"
+    if (lambda1 !is Function0<*>) return "Failed: lambda1 is Function0<*>"
+
+    if (localFun0 !is Function1<*, *>) return "Failed: localFun0 is Function1<*, *>"
+    if (localFun1 !is Function0<*>) return "Failed: localFun1 is Function0<*>"
+
+    return "OK"
+}