Add vtkWasmSceneManager for using vtkObjectManager in browser (wasm)

- Add javascript bindings for `vtkWasmSceneManager`
- Add test data for JS tests in `WebAssembly`
- Add new `vtk_add_test_module_javascript_node` to run JavaScript
  tests with `node`.
- Modified `vtk_add_test_cxx` and `vtk_module_test_executable` to skip
  compilation and execution of C++ tests for vtk.wasm pending vtk/vtk#19097
- Some modules bypass `vtk_add_test_cxx`, so use correct linker flags for
  filesystem support in `vtk_module_test_executable`
- Removes unnecessary linker flag property from Filters/CellGrid/Testing