This is a reliqua from the early days of the modeltests/regressiontests era.

because the roles (specifically RESOURCE) are deprecated.
Also added optional support for creating views in tests, and made an
introspection test fail (rather than skip)  if a view cannot be created
due to lacking privileges.

Refs #18782

Thanks Tim Graham for review, and Josh Smeaton

and ReverseSingleRelatedObjectDescriptor so they actually return QuerySet
instances.

Also ensured that SingleRelatedObjectDescriptor.get_queryset() accounts
for use_for_related_fields=True.

This cleanup lays the groundwork for #23533.

Thanks Anssi Kääriäinen for the review.

Thanks rodolfo_3 for the report and the initial patch, and
Josh Smeaton, Shai Berger and Tim Graham for the reviews.

This cleanup lays the groundwork for #23533 and also addresses
the issue that GeoManager.get_queryset() failed to pass the
database router hints to the QuerySet constructor.

Thanks Anssi Kääriäinen for the review.

Thanks @abhillman and @Markush2010 for submitting the ticket.

Thanks to @aaugustin for submitting the ticket.

Refs commit 11f307a5.

Translating an empty string used to return the gettext catalog
metadata instead of the empty string.
Thanks Ned Batchelder for the suggestion, Tim Graham for the review
and Anton Berezin and Claude Paroz for contributions to the patch.

Thanks aks for the report.

>>> from django.template.defaultfilters import register
>>> len(register.filters)
57

Don't recommend using sudo when installing uwsgi

Thanks Josh Smeaton and Claude Paroz for advice.

Originally I added migrations to flake8 exclude because of long lines
in migration files, but there are other directories named migrations we
do want to check. We are not warning on line lengths yet anyway.

Thanks Marc Tamlyn for the patch.

Thanks Tim Graham for the review.

Thanks Mattia Procopio for the report.

Oracle cannot order_by() a TextField; refs #23504.