Add new public object2Groovy method for use in other contexts.

Specifically, I'm going to be consuming this in Declarative for a
Declarative-specific "directive generator" like the Snippet Generator,
but for Declarative directives like `options`, `triggers`, `when`, etc.

There'll eventually be a followup PR once that has been implemented in
Declarative to add a link to the Directive Generator or whatever we
end up calling it to the Pipeline Syntax sidepanel.jelly
(conditionally - i.e., if a new enough version of Declarative is
installed) but there's no point in doing that yet since I can't
actually implement it without this method being public. =)

Author: abayer

src/main/java/org/jenkinsci/plugins/workflow/cps/Snippetizer.java

@@ -79,6 +79,17 @@ static String step2Groovy(Step s) throws UnsupportedOperationException {
         return object2Groovy(new StringBuilder(), s, false).toString();
     }
 
+    /**
+     * Publicly accessible version of {@link #object2Groovy(StringBuilder, Object, boolean)} that translates an object into
+     * the equivalent Pipeline Groovy string.
+     *
+     * @param o The object to translate.
+     * @return A string translation of the object.
+     */
+    public static String object2Groovy(Object o) throws UnsupportedOperationException {
+        return object2Groovy(new StringBuilder(), o, false).toString();
+    }
+
     /**
      * Renders the invocation syntax to re-create a given object 'o' into 'b'
      *