[IMP] hr_timesheet: make timesheet_encode_uom_id required in config

The related field `timesheet_encode_uom_id` is required
on the company, but not on the settings.
This commit makes it requried through the view to
avoid a confusing SQL error message for the end user.

Closes #27645

addons/hr_timesheet/views/res_config_settings_views.xml

@@ -35,7 +35,7 @@
                                 </div>
                                 <div class="content-group">
                                     <div class="mt16">
-                                        <field name="timesheet_encode_uom_id" options="{'no_create': True}"/>
+                                        <field name="timesheet_encode_uom_id" options="{'no_create': True}" required="1"/>
                                     </div>
                                 </div>
                             </div>