comply with official django async orm syntax

[rednaks]

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when we patch models, we prefix the methods with async_ but the new official django api prefixes the methods with a ex:

patched api : sync objects.get => async objects.async_get official api: sync objects.get => async objects.aget

so to make it forward compatible we need to comply to django's new api.

be aware to keep our api so we don't break the internet