[IMP] account: define country_code field in move view

Define country_code field in main view to avoid redefining
it in every localization whenever it is needed to use in
attrs.

task: 2228210

addons/account/views/account_move_views.xml

@@ -578,6 +578,7 @@
                         <field name="invoice_has_matching_suspense_amount" invisible="1"/>
                         <field name="has_reconciled_entries" invisible="1"/>
                         <field name="restrict_mode_hash_table" invisible="1"/>
+                        <field name="country_code" invisible="1"/>
 
                         <div class="oe_title">
                             <!-- Invoice draft header -->