[FIX] web : display timepicker in ltr direction for rtl lang

Issue:
======
The time display for rtl language is the sale as ltr but in the
timepicker it's displayed as seconds-minutes-hours which is wrong.

Steps to reproduce the error:
=============================
1-Install calendar
2-Change the language to Arabic
3-Go to calendar and click on create new
4-Click on the datepicker for start for example and click on select time

Solution:
=========
I made the display of the datepicker independant of the direction of
language and alwyas display it in ltr direction.

opw-3423875

closes odoo/odoo#132589

X-original-commit: 3e21b50ef51b9f3ebf06b5cd16e3b11497b56896
Signed-off-by: Julien Mougenot (jum) <jum@odoo.com>
Signed-off-by: Mahdi Cheikh Rouhou (macr) <macr@odoo.com>

addons/web/static/src/core/datetime/datetime_picker.scss

@@ -147,4 +147,9 @@
     .o_text_sm {
         font-size: 0.875rem;
     }
+
+    .o_time_picker {
+        /*rtl:ignore*/
+        direction: ltr;
+    }
 }