Odoo Release Updates

[FIX] ai: do not show ask ai if no responsible ai agent

[REF] web_gantt: remove dead code in multi create tests

[FIX] pos_enterprise, pos_appointment: dark mode visibility issues

[IMP] pos_mobile: open customer display automatically for next time

[IMP] l10n_test_website_sale: adapt tour_new_billing_ec

[IMP] account_online_payment: send email on webhook and add tests

[FIX] l10n_{be, nl}_reports: Improve VAT payment instruction layout

[IMP] knowledge: Promen-ad-ulation

[FIX] spreadsheet_sale_management : unlink spreadsheet when so template is changed