[JS IR BE] Make kotlinx.io compile

- Fix expect/actual default arguments
 - Fix dynamic type in inliner
 - Fix external varargs

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt

@@ -48,7 +48,7 @@ private val arrayConstructorPhase = makeIrFilePhase(
 )
 
 private val expectDeclarationsRemovingPhase = makeIrFilePhase(
-    ::ExpectDeclarationsRemoving,
+    ::ExpectDeclarationsRemoveLowering,
     name = "ExpectDeclarationsRemoving",
     description = "Remove expect declaration from module fragment"
 )