[HacktoberFest][Missing Docstrings] Adapters

[patrickvonplaten]

This feature request is included in this years Diffusers' Hacktoberfest 👨‍💻!

Hacktoberfest's purpose is to give upcoming open-source developers the opportunity to learn about open-source and programming by fixes simple issues (like this one).

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Issue

The forward methods of the adapter modles and nn.Modules, e.g. are completely missing docstrings, can you add them?

[mallikharjuna160003]

Working on it :)

[mallikharjuna160003]

Please assign to me

[Nandika-A]

I have solved this issue in #5253