Package alterator-wizardface: Information

- Add captions for Help and Accessibility buttons.
- Toggle screen reader using Ctrl+R keystroke.
- Added installer-a11yctl CLI util to control the accessibility
  components.
- Run the screen reader if specified in the kernel command line
  (use a11y=reader option for that).
- Adjust the ALSA configuration when starting the screen reader.
- Added the accessibility backend and popup.
- Added the "Accessibility options" button.

- NMU: Remove alterator-wizardface-usermode subpackage (closes: 54142).

- Use the new 'on-replace' frame hook to fix setting of the help
  page on multi-form steps (closes: 42514).