legacy vtk extract issues

[cyrush]

• check if fields are written as well as the mesh data
• filenames need to use cycle, or some other counter option to avoid overwriting

[indra098124]

if I am looking at the right place, I can see that the basename used to generated directory for vtk file uses a fixed name

// we create
    // file: basename.visit
    // directory: basename + "_vtk_files"
    // files: basename + "_vtk_files/basename_%08d.vtk"

    std::string output_base = params()["path"].as_string();
    
    std::string output_files_dir  = output_base + "_vtk_files";
    std::string output_visit_file = output_base + ".visit";

https://github.com/Alpine-DAV/ascent/blob/develop/src/libs/ascent/runtimes/flow_filters/ascent_runtime_vtkh_filters.cpp

I also see that fields are written in the vtk file but only those fields which are referenced in the acent_actions. In the same ascent action I have some scenes which reference to fields, my vtk output depends on them instead of having all fields.