sysupdate: add support for --component-all + --feature-all + --feature-suggested...

sysupdate: add support for --component-all + --feature-all + --feature-suggested to enable-feature verb

This adds similar concepts as we already have for enable-component:
let's add a way to enable all features or the suggeste dones, and
possibly on all components.

Or in other words, with this:

  systemd-sysupdate enable-component -S
  systemd-sysupdate enable-feature -A -s

We'll automatically enable all suggested components, and all features of
them.