Frontpage speedup

See merge request !375

- User prefetch_related to load data ahead of time
- Adds a new simple serializer, that does not use properties that
  triggers new queries

Enable us to render a spinner while the hook loads

Remove remnant of Sponsor term

See merge request !374

Show end date for role and filter on status

See merge request !373

Show confimation box or error box for 'end role'

See merge request !370

GREG-309: Show confirmation or error box when cancel invitation

See merge request !371

GREG-307: Show that new invitation is sent

See merge request !368

Show confirmation or error box when changing role period

See merge request !372

Allow setting language via query string

See merge request !369

Greg 306 role ends email

See merge request !365

Add a management command for migrating roles between OUs

See merge request !367

Change Cerebrum sponsor import to replace manual SponsorOrganizationalUnits with an automatic one

See merge request !366

- Support running the OrgReg import directly via management command
- Only log OUs as updated if there are changes
- Log changed attributes with new and old value
- Fix updating changed OU identifiers

Norwegian national id card

See merge request !364

Change to Python 3.10 base image, require 3.10 and update all packages

See merge request !363

Handle updates better in guest import

See merge request !362

Introduces the --update-existing option, set to False by default. Thie
option controls whether or not we want to update already imported
information with the info from the file.

This is usually not what we want since sponsors may have changed the end
dates for already imported roles after the previous import. We choose to
leave it as an option so that we CAN overwrite information if we really
want.

This commit also removes the ignore-id-req option since that only makes
matter worse than not importing the person.

Fix orgreg import not seeing duplicates

See merge request !361

OuIdentifiers used to be restricted to the name+value combination to
make sure that no two units could have the same legacy_stedkode. This
becomes problematic when two units have the same short_name.

This makes it possible for two units to have the same value for the same
OuIdentifier name, and adds a constraint that makes it impossible for
each unit to have more than one OuIdentifier with the same 'name', i.e
multiple legacy_stedkode for one unit.

The import script checked the source instead of the value when looking
for existing values. This caused the unique constraint on the
name+values combination to fail. We now check the value and name instead
of value and source.

Upgrade orgreg client

See merge request !359