[FIX] account: set partner_id field of account.move as not required in the view

Having this field required in the view forbade the 'send for digitalization' button of account_invoice_extract to work, as it could be empty there (as the invoice was created via .create({})). The constraint defined in the view was checked before executing the code related to the button and caused everything to fail before running anything.

closes odoo/odoo#37279

Signed-off-by: Laurent Smet <smetl@users.noreply.github.com>

addons/account/views/account_move_views.xml

@@ -558,7 +558,6 @@
                                        options='{"always_reload": True, "no_quick_create": True}'
                                        attrs="{
                                            'invisible': [('type', 'not in', ('out_invoice', 'out_refund', 'in_invoice', 'in_refund', 'out_receipt', 'in_receipt'))],
-                                           'required': [('type', 'in', ('out_invoice', 'out_refund', 'in_invoice', 'in_refund', 'out_receipt', 'in_receipt'))]
                                        }"/>
 
                                 <!-- Invoice payment terms (only invoices) + due date (only invoices / receipts) -->