Drop module "ktm" scripts and support java source roots in "xml" modules

Drop kotlin.modules package from runtime
Move adapted classes into compiler
Unsupport files with "ktm" extension
Delete code for loading module scripts
Drop tests for module scripts
Separate section for java source roots in xml script generator/parser

idea/src/org/jetbrains/kotlin/idea/JetFileFactory.java

@@ -24,6 +24,6 @@ import org.jetbrains.annotations.NotNull;
 public class JetFileFactory extends FileTypeFactory {
     @Override
     public void createFileTypes(@NotNull FileTypeConsumer consumer) {
-        consumer.consume(JetFileType.INSTANCE, "kt;kts;ktm");
+        consumer.consume(JetFileType.INSTANCE, "kt;kts");
     }
 }