Object replication forms should not inherit from ModelForm

[jeremystretch]

Proposed Changes

Convert all forms which facilitate the automatic replication of new objects from a pattern (e.g. InterfaceCreateForm) to regular forms which do not inherit from ModelForm.

Justification

Inheriting from ModelForm results in calling clean() on the resulting instance, which may not be desirable. See #11032 for an example where this is problematic.