[FIX] hr_recruitment: no create on ir_attachment action

The "Resumes and Letters" action simply displays ir_attachments
linked to hr_applicant objects; but there is no default_res_model
in the context so no ir_attachment you create is actually
displayed in the kanban view.

Since the goal of this action is simply to display attachments
linked to applicants, it makes more sense to disable the create button
and to force people to upload resumes and cover letters through
the applicant record.

addons/hr_recruitment/views/hr_recruitment_views.xml

@@ -559,6 +559,7 @@
         <field name="view_mode">kanban,tree,form</field>
         <field name="view_id" ref="mail.view_document_file_kanban"/>
         <field name="domain">[('res_model','=','hr.applicant')]</field>
+        <field name="context">{'create': False}</field>
         <field name="help" type="html">
             <p>
                 Search through resumes and motivation letters.