[JS IR] Generate context dependent names for anonymous objects and classes.

js/js.translator/testData/box/local/contextDependentLocalClassName.kt

@@ -0,0 +1,13 @@
+// CHECK_FUNCTION_EXISTS: box$MyClass TARGET_BACKENDS=JS_IR
+// CHECK_FUNCTION_EXISTS: box$MyClass$ok$InternalClass TARGET_BACKENDS=JS_IR
+fun box(): String {
+    class MyClass {
+        fun ok(): String {
+            class InternalClass {
+                fun getOk(): String = "OK"
+            }
+            return InternalClass().getOk()
+        }
+    }
+    return MyClass().ok()
+}