[FIX] hr_recruitment: job stages choosen manually

In 9.0, stages of a job position in recruitment are not share by
default, there is a "New" stage and existing stages can be added in the
form view (since 780f46ae).

When creating a job position, the "New" is not working with the given
widget type.

This commit doesn't show stages in the form view until the record is
created.

opw-1839217
closes #24706

addons/hr_recruitment/views/hr_recruitment_views.xml

@@ -408,7 +408,9 @@
                     <field name="address_id" context="{'show_address': 1}" domain= "[('is_company', '=', True )]" options="{'always_reload': True}"/>
                 </group>
                 <group colspan="2">
-                    <field name="stage_ids" widget="many2many_tags" options="{'no_create': True}" />
+                    <!-- ONLY FOR 9.0 -->
+                    <field name="id" invisible="1"/>
+                    <field name="stage_ids" widget="many2many_tags" options="{'no_create': True}" attrs="{'invisible': [('id', '=', False)]}"/>
                 </group>
             </group>
             <xpath expr="//field[@name='department_id']" position="after">