You have to create your custom tree view in your custom module and then inherit the applicant's view and then add attribute context="{'tree_view_ref': 'your_tree_view_id'}"
in context (partner_id) field.
Like this:
<record id="inherit_view_partner_tree" model="ir.ui.view">
<field name="name">res.partner.inherit.tree</field>
<field name="model">res.partner</field>
<field eval="8" name="priority"/>
<field name="arch" type="xml">
<tree string="Contacts">
<field name="name"/>
<field name="phone"/>
<field name="email"/>
<field name="street"/>
<field name="country_id"/>
</tree>
</field>
</record>
<record id="inherit_crm_case_form_view_job" model="ir.ui.view">
<field name="name">Jobs - Recruitment Form</field>
<field name="model">hr.applicant</field>
<field name="inherit_id" ref=" hr_recruitment.crm_case_form_view_job "
<field name="partner_id" position="attributes">
<attribute name="context">{'tree_view_ref': 'inherit_view_partner_tree'}</attribute>
</field>
<field
</record>