Add AutoId functionality everywhere it can apply

[digitaldogsbody]

While putting together some examples for Juls in the Slack channel (https://iiif.slack.com/archives/C04EWD70FCH/p1674485405806519), I discovered that the AutoId helper doesn't work for some objects that you can create such as Provider.

I think that all of these inherit from the Class metaclass (downstream of the Base class), so we can apply the AutoId helper there, in the same way that we did with the AutoLabel helper in #155