Generate Proper Resource Paths

The TCK tested incorrect resource paths which means MyFaces has been incorrect the whole time (along with Mojarra until 4.0.0).

For non faces requests, the resource path (using the attached TCK app) would be generated like this:

/jsf_appl_resource_web/TestServlet/jakarta.faces.resource/duke-boxer.gif?ln=images

where TestServlet is the servlet mapping. However, the correct path should use the appropriate faces mapping instead (i.e prefix with /faces/ or use the xhtml extension)

You can read BalusC's reply in this issue: https://github.com/jakartaee/faces/issues/1663

Additionally, Mojarra updated to use Servlet 4 API Mappings (https://github.com/eclipse-ee4j/mojarra/pull/4956), and it might be good for us to update to that as well. I'll create a separate JIRA – MYFACES-4525)