I added this 

class SupplierInherit(models.Model):
    _inherit = 'product.supplierinfo'

    vendor_stockinfo = fields.Integer(string="Vendor Stock")
<record id="inherit_supplierinfo_tree_view_vendor_stockinfo" model="ir.ui.view">
    <field name="name">Add vendor_stockinfo to product.product_supplierinfo_tree_view</field>
    <field name="model">product.supplierinfo</field>
    <field name="inherit_id" ref="product.product_supplierinfo_tree_view"/>
    <field name="arch" type="xml">
        <xpath expr="//field[@name='product_code']" position="after">
            <field name="vendor_stockinfo"/>
        </xpath>
    </field>
</record>
<record id="product_template_form_view_inherit_override_seller_ids" model="ir.ui.view">
    <field name="name">Override seller_ids with custom tree</field>
    <field name="model">product.template</field>
    <field name="inherit_id" ref="product.product_template_form_view"/>
    <field name="arch" type="xml">
        <xpath expr="//field[@name='seller_ids']" position="replace">
            <field name="seller_ids"
                   context="{'default_product_tmpl_id': id, 'list_view_ref': 'your_module.custom_supplierinfo_tree_view_with_vendor_stock'}"
                   nolabel="1"
                   invisible="product_variant_count &gt; 1"
                   readonly="product_variant_count &gt; 1"
            />
        </xpath>
    </field>
</record>


but field is not showing