Make pmd language have a hook to launch CPD

This allows removing the CPD language instances,
sharing more logic between CPD and PMD, and using
language properties to configure CPD and PMD uniformly.

pmd-scala-modules/pmd-scala-common/src/main/java/net/sourceforge/pmd/cpd/ScalaTokenizer.java

@@ -62,7 +62,7 @@ public class ScalaTokenizer implements Tokenizer {
     }
 
     @Override
-    public void tokenize(SourceCode sourceCode, Tokens tokenEntries) throws IOException {
+    public void tokenize(TextDocument sourceCode, Tokens tokenEntries) throws IOException {
 
 
         try (TextDocument textDoc = TextDocument.create(CpdCompat.cpdCompat(sourceCode))) {