[JS IR] Support generating both IR and pre-IR libraries

Remove all previous -Xir options

Add:
 -Xir-produce-klib-dir
 -Xir-produce-klib-file
 -Xir-produce-js
 -Xir-only

libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/K2JSCompilerMojo.java

@@ -105,8 +105,9 @@ public class K2JSCompilerMojo extends KotlinCompileMojoBase<K2JSCompilerArgument
         arguments.setMetaInfo(metaInfo);
         arguments.setModuleKind(moduleKind);
         arguments.setMain(main);
-        arguments.setIrBackend(useIrBackend);
-        arguments.setIrLegacyGradlePluginCompatibility(true);
+        arguments.setIrOnly(useIrBackend);
+        arguments.setIrProduceJs(useIrBackend);
+        arguments.setIrProduceKlibDir(useIrBackend);
 
         List<String> libraries;
         try {