[IMP] sale, base: partner form view improvement

Improved partner form consistency and clarity via following changes:
- Renamed string and tooltip from Shipping address to Delivery address
- Changed description of the customer address
- Re-organised contact partner form and added image of partner
- Changed default avatar to a simpler one that is not Stephane Bern
- Test case improvement

Task ID: 192044

closes odoo/odoo#29917