[FIX] web: calendar_controller: Adapt date to server format on update

Issue

	- Install "Time-Off" module
	- Set user language to "Arabic"
	- Open "Time-Off"

	Traceback raised.

Cause

	On update, JS send to backend date in arabic.
	Python 'datetime' library does not manage arabic date.

Solution

	Convert date format for the "server" on js-side.
	In this case, it will also translate arabic numbers.

	Also, adapt "dateToServer" to handle any format.

opw-2421268

closes odoo/odoo#63928

X-original-commit: c11e0fe2673fd18e6db45fd18a153042d525990a
Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>
Signed-off-by: bon-odoo <nboulif@users.noreply.github.com>

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

@@ -18,8 +18,12 @@ 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');
+function dateToServer (date, fieldType) {
+    date = date.clone().locale('en');
+    if (fieldType === "date") {
+        return date.local().format('YYYY-MM-DD');
+    }
+    return date.utc().format('YYYY-MM-DD HH:mm:ss');
 }
 
 var CalendarController = AbstractController.extend({
@@ -151,7 +155,7 @@ var CalendarController = AbstractController.extend({
             self._rpc({
                 model: self.modelName,
                 method: 'get_unusual_days',
-                args: [self.model.data.start_date.format('YYYY-MM-DD'), self.model.data.end_date.format('YYYY-MM-DD')],
+                args: [dateToServer(self.model.data.start_date, 'date'), dateToServer(self.model.data.end_date, 'date')],
                 context: self.context,
             }).then(function (data) {
                 _.each(self.$el.find('td.fc-day'), function (td) {