Recover after #909 (#925)

* Fix stubs related to `(Async)RequestFactory` and `(Async)Client`

* Revert incorrect removal.

* Allow set as `unique_together`, use shared type alias.

* Revert `Q.__init__` to use only `*args, **kwargs` to remove false-positive with `Q(**{...})`

* Add abstract methods to `HttpResponseBase` to create common interface.

* Remove monkey-patched attributes from `HttpResponseBase` subclasses.

* Add QueryDict mutability checks (+ plugin support)

* Fix lint

* Return back GenericForeignKey to `Options.get_fields`

* Minor fixup

* Make plugin code typecheck with `--warn-unreachable`, minor performance increase.

* Better types for `{unique, index}_together` and Options.

* Fix odd type of `URLResolver.urlconf_name` which isn't a str actually.

* Better types for field migration operations.

* Revert form.files to `MultiValueDict[str, UploadedFile]`

* Compatibility fix (#916)

* Do not assume that `Annotated` is always related to django-stubs (fixes #893)

* Restrict `FormView.get_form` return type to `_FormT` (class type argument). Now it is resolved to `form_class` argument if present, but also errors if it is not subclass of _FormT

* Fix CI (make test runnable on 3.8)

* Fix CI (make test runnable on 3.8 _again_)

mypy_django_plugin/lib/fullnames.py

@@ -35,6 +35,7 @@ RELATED_FIELDS_CLASSES = {FOREIGN_KEY_FULLNAME, ONETOONE_FIELD_FULLNAME, MANYTOM
 MIGRATION_CLASS_FULLNAME = "django.db.migrations.migration.Migration"
 OPTIONS_CLASS_FULLNAME = "django.db.models.options.Options"
 HTTPREQUEST_CLASS_FULLNAME = "django.http.request.HttpRequest"
+QUERYDICT_CLASS_FULLNAME = "django.http.request.QueryDict"
 
 COMBINABLE_EXPRESSION_FULLNAME = "django.db.models.expressions.Combinable"
 F_EXPRESSION_FULLNAME = "django.db.models.expressions.F"