Add address fields to client contracts view

CHANGELOG:

### Added
- [#853](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/853) Add address fields to client contracts view

Related card: https://trello.com/c/03FT3Zeq/1342-afegir-columnes-adre%C3%A7a-i-ciutat-a-la-vista-contracte-de-clients

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