Improve `Address` validation in address component

### Description

Currently, the [address component](https://docs.altinn.studio/nb/altinn-studio/v8/reference/ux/components/address/) only validates the postal code, while the address field itself accepts any arbitrary input. This can lead to inconsistent or invalid address data being submitted.

We are currently implementing custom validation against GeoNorge to ensure address accuracy. However, it would be very beneficial if this validation was supported natively within the address component.

Suggested improvement:

- Add built-in validation for the address field (e.g., street name + number)
- Provide real-time validation or autocomplete suggestions based on valid addresses

example:

This would improve data quality and reduce the need for custom validation logic on the consumer side.

Start with the address component implementation corresponding to the linked documentation and trace its existing postal-code validation. Define the validation and autocomplete behavior around the GeoNorge use case; done means the address field supports native valid-address checking without consumer-side custom validation.

Written by the indexing model from the issue text.