[FIX] web: format date without locale

moment().locale('en').format('YYYY-MM-DD')
"2019-03-25"
moment().locale('ar').format('YYYY-MM-DD')
"٢٠١٩-٠٣-٢٥"
moment().locale('my').format('YYYY-MM-DD')
"၂၀၁၉-၀၃-၂၅"

Was rejected as a valid bug at moment/moment#4448
Apply the same logic than 109b319d64

Fixes odoo/odoo#32081

closes odoo/odoo#32102

Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>

addons/web/static/src/js/views/calendar/calendar_controller.js

@@ -19,6 +19,10 @@ var QuickCreate = require('web.CalendarQuickCreate');
 var _t = core._t;
 var QWeb = core.qweb;
 
+function dateToServer (date) {
+    return date.clone().utc().locale('en').format('YYYY-MM-DD HH:mm:ss');
+}
+
 var CalendarController = AbstractController.extend({
     custom_events: _.extend({}, AbstractController.prototype.custom_events, {
         changeDate: '_onChangeDate',
@@ -236,7 +240,7 @@ var CalendarController = AbstractController.extend({
 
         for (var k in context) {
             if (context[k] && context[k]._isAMomentObject) {
-                context[k] = context[k].clone().utc().format('YYYY-MM-DD HH:mm:ss');
+                context[k] = dateToServer(context[k]);
             }
         }