[JS IR BE] Cast types in bridges

compiler/testData/codegen/box/bridges/strListContains.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND: NATIVE
+// IGNORE_BACKEND: JS_IR
 
 class StrList : List<String?> {
     override val size: Int

compiler/testData/codegen/box/specialBuiltins/emptyMap.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 private object EmptyMap : Map<Any, Nothing> {
     override val size: Int get() = 0
     override fun isEmpty(): Boolean = true

compiler/testData/codegen/box/specialBuiltins/emptyStringMap.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JS_IR
 private object EmptyStringMap : Map<String, Nothing> {
     override val size: Int get() = 0
     override fun isEmpty(): Boolean = true