JS IR: top-level initializer lowering

compiler/testData/codegen/box/functions/kt395.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 fun Any.with(operation :  Any.() -> Any) = operation().toString()
 
 val f = { a : Int -> }

compiler/testData/codegen/box/objects/anonymousObjectPropertyInitialization.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 interface T {
     fun foo(): String
 }

compiler/testData/codegen/box/typealias/typeAliasInAnonymousObjectType.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 open class Foo<T>(val x: T)
 
 typealias FooStr = Foo<String>