silx.io.url: h5pyd compatibility

[felix-engelmann]

h5pyd changed their Config (HDFGroup/h5pyd@880721b) and the current version of silx with h5pyd>=0.20.0 no longer works and fails with an error:

$ silx view http://localhost:8000/  
ERROR:silx.app.view.main:An error occured in silx view:
ERROR:silx.app.view.main:<class 'AttributeError'> module 'h5pyd' has no attribute 'Config'   File "/home/felix/Dokumente/maxiv/laptop/maxiv/projects/hdf5/silx/.venv/bin/silx", line 10, in <module>
    sys.exit(main())
             ^^^^^^
  File "/home/felix/Dokumente/maxiv/laptop/maxiv/projects/hdf5/silx/.venv/lib/python3.12/site-packages/silx/__main__.py", line 76, in main
    status = launcher.execute(sys.argv)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/felix/Dokumente/maxiv/laptop/maxiv/projects/hdf5/silx/.venv/lib/python3.12/site-packages/silx/utils/launcher.py", line 289, in execute
    return command.execute(command_argv)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/felix/Dokumente/maxiv/laptop/maxiv/projects/hdf5/silx/.venv/lib/python3.12/site-packages/silx/utils/launcher.py", line 126, in execute
    status = func(argv)
             ^^^^^^^^^^
  File "/home/felix/Dokumente/maxiv/laptop/maxiv/projects/hdf5/silx/.venv/lib/python3.12/site-packages/silx/app/view/main.py", line 206, in main
    mainQt(options)
  File "/home/felix/Dokumente/maxiv/laptop/maxiv/projects/hdf5/silx/.venv/lib/python3.12/site-packages/silx/app/view/main.py", line 185, in mainQt
    window.appendFile(url.path())
  File "/home/felix/Dokumente/maxiv/laptop/maxiv/projects/hdf5/silx/.venv/lib/python3.12/site-packages/silx/app/view/Viewer.py", line 927, in appendFile
    self.__treeview.findHdf5TreeModel().appendFile(filename)
  File "/home/felix/Dokumente/maxiv/laptop/maxiv/projects/hdf5/silx/.venv/lib/python3.12/site-packages/silx/gui/hdf5/Hdf5TreeModel.py", line 808, in appendFile
    self.insertFile(filename, -1)
  File "/home/felix/Dokumente/maxiv/laptop/maxiv/projects/hdf5/silx/.venv/lib/python3.12/site-packages/silx/gui/hdf5/Hdf5TreeModel.py", line 792, in insertFile
    h5file = silx_io.open(filename)
             ^^^^^^^^^^^^^^^^^^^^^^
  File "/home/felix/Dokumente/maxiv/laptop/maxiv/projects/hdf5/silx/.venv/lib/python3.12/site-packages/silx/io/utils.py", line 701, in open
    return _open_url_with_h5pyd(filename)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/felix/Dokumente/maxiv/laptop/maxiv/projects/hdf5/silx/.venv/lib/python3.12/site-packages/silx/io/utils.py", line 611, in _open_url_with_h5pyd
    cfg = h5pyd.Config()
          ^^^^^^^^^^^^

This PR checks for availability of the new method and falls back to the old version. Therefore it should be compatible with older h5pyd versions as well.