[FIX] web: Fix the skiped focus on radio

Currently, when form view is opened in edit mode and if you proceed
through the tab(keyboard) then focus is skiped on radio field.
For Ex: in project when you procceed through the tab it will skip the
visibility field radio.

The issue occurs because the radio is inherited from the selection
field and in selection field the focus is set on 'select' while
there is no method to set the focus in radio and radio does not have
'select' element it has 'input'

So in this commit, override the method getFocusableElement in radio
widget and set the focus on 'input' instead of 'select'.

closes odoo/odoo#52073

Taskid: 2252798
Closes: #52073
Related: odoo/upgrade#1430
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

addons/web/static/src/js/fields/relational_fields.js

@@ -3048,6 +3048,14 @@ var FieldRadio = FieldSelection.extend({
     // Public
     //--------------------------------------------------------------------------
 
+    /**
+     * @override
+     * @returns {jQuery}
+     */
+    getFocusableElement: function () {
+        return this.mode === 'edit' && this.$input || this.$el;
+    },
+
     /**
      * @override
      * @returns {boolean} always true