[IMP] website sales salesteam: refactored implementation

[IMP] website sales salesteam: refactored implementation
- now having a website sales sales team in website_sale;
- temporarily crm accepted as a dependency of website_sale (will be improved when sales team are
taken out of crm);
- removed website_sale_crm unnecessary module + dead code
- removed shopping cart state + its management
- added acquirer and transaction fields on sale order
- azdded use_opportunities and use_quotations fields on sales team like use_leads