manager .filter and .all methods aren't returning QuerySet but a list

[joaoariedi]

Describe the bug The manager .filter and .all methods aren't returning a QuerySet and it's bugging the pydantic serializations for lists.

To Reproduce

>>> from app.companies.models import Company
>>> await Company.all()
[<Company: 1>, <Company: 2>, <Company: 3>]

>>> type(await Company.all())
<class 'list'>

>>> await Company.filter(active=True)
[<Company: 1>, <Company: 2>, <Company: 3>]

>>> type(await Company.filter(active=True))
<class 'list'>

    __root__=[submodel.from_orm(e) for e in await queryset.prefetch_related(*fetch_fields)]
                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'list' object has no attribute 'prefetch_related'

Expected behavior A QuerySet object should returns.