Upgrade to Python 3.12, remove django-choices and a couple other package updates.

[duckduckgrayduck]

• Upgraded pylint and related plugins
• Upgraded stripe because our old version does not support 3.12. Upgraded to a version that supports 3.12.
• Removed django-choices and replaced with Django's built in choices.
• Various linting and format fixes to align with the new pylint.

[duckduckgrayduck]

Ok, I'm hitting an issue now with both the construction of the test database and running the migrations in the deploy preview. I get the following error:

sql` = 'ALTER TABLE "users_user" ALTER COLUMN "email" TYPE varchar(254) COLLATE "case_insensitive"'
params =
ignored_wrapper_args = (False, {'connection': , 'cursor': <django.db.backends.utils.CursorWrapper object at 0x7fed216483d0>})

def _execute(self, sql, params, *ignored_wrapper_args):
    # Raise a warning during app initialization (stored_app_configs is only
    # ever set during testing).
    if not apps.ready and not apps.stored_app_configs:
        warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
    self.db.validate_no_broken_transaction()
    with self.db.wrap_database_errors:
        if params is :
            # params default might be backend specific.

          return self.cursor.execute(sql)

E django.db.utils.NotSupportedError: nondeterministic collations are not supported for operator class `"varchar_pattern_ops"

in users/models.py the email field does appear to have a collation
email = models.EmailField(
("email"),
unique=True, # All non-NULL values must be unique
null=True, # PostgresQL treats each NULL as unique
help_text=("The user's email address"),
db_collation="case_insensitive",
)

I'm seeing some relevant discussions here:
https://code.djangoproject.com/ticket/36261
https://forum.djangoproject.com/t/icontains-lookup-when-using-nondeterministic-collations-in-postgres-fails/25696/6
and here:
https://adamj.eu/tech/2023/02/23/migrate-django-postgresql-ci-fields-case-insensitive-collation/#adding-new-case-insensitive-db-collation-fields-can-fail (albeit this is for migrating to 5.2)

Not sure what is the best path forward here.