* Closes#15794: Make "related objects" dynamic
Instead of hardcoding relationships between models for the detail view,
they are now dynamically generated.
* Fix related models call
* Remove extra related models hook
Instead of providing a rarely used hook method, additional related
models can now be passed directly to the lookup method.
* Fix relations view for ASNs
ASNs have ManyToMany relationships and therefore can't used automatic
resolving. Explicit relations have been restored as before.
* Add method call keywords for clarification
* Cleanup related models
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Co-authored-by: Jeremy Stretch <jstretch@netboxlabs.com>