Fixed #28859 -- Made Oracle backend raise DatabaseError if "no data found" exception is hidden by the Oracle OCI library.

Thanks Tim Graham for the review and Jani Tiainen for the report.

Thanks avalanchy for the initial patch.

Also fixed #28608 -- Allowed UserCreationForm and UserChangeForm to
work with custom user models.

Thanks Sagar Chalise and Rômulo Collopy for reports, and Tim Graham
and Tim Martin for reviews.

Fixed #28517 -- Fixed admin delete confirmation view crash when related models don't have a delete permission.

Follow up to acc8dd41.

Fixed #28986 -- Prevented boolean values in admin list display from being formatted with thousand separators.

The plan is to later deprecate/remove storing the language in the session.

Unused since a8a81aae.

Also updated the autodetector to assume the RenameField operation will
perform the required repointing.

This allows field and special operations to use this logic.

Fixed #28117 -- Added a helpful message in loaddata when psycopg2 can't load a fixture due to NUL characters.

Used Decimal.scaleb() in backends.utils.format_number() and DecimalField.widget_attrs() to improve performance.