[QW][4034651]add_product_id

<data>
    <!--
    #Done by RHT on the 16/07/2027
    #Pastebin : https://pastebin.com/w0A1i7pv
    #Need: Need to see the product that is being produced from the Gantt view
    #Task: https://www.odoo.com/odoo/project.task/4034651?cids=1
    -->
    <xpath expr="//field[@name='json_popover']" position="after">
        <field name="product_id"/>
    </xpath>
    <xpath expr="//t[@t-esc='workcenter_id[1]']/.." position="after">
        <li><strong>Product: </strong> <t t-esc="product_id"/></li>
    </xpath>
</data>