[FIX] website_payment: don't add link manage payment if no provider

Before this fix, the link was always present, even if no acquirer payment was configurated to allow tokenization.

addons/website_payment/views/website_payment_templates.xml

@@ -80,9 +80,11 @@
         </t>
     </template>
 
-    <template id="pay_meth_link" inherit_id="website_portal.portal_layout">
+    <template id="pay_meth_link" inherit_id="website_portal.portal_layout" customize_show="True">
         <xpath expr="//div[@class='o_my_details']" position="inside">
-            <div class='manage_payment_method mt16'><a href="/my/payment_method">Manage your payment methods</a></div>
+            <t t-if="request.env['payment.acquirer'].search([('website_published', '=', True), ('registration_view_template_id', '!=', False)])">
+                <div class='manage_payment_method mt16'><a href="/my/payment_method">Manage your payment methods</a></div>
+            </t>
         </xpath>
     </template>