[FIX] website_sale: fix authorized message

Field `auth_msg` never existed, this is an uncaught mistake. This commit
removes its usage and displays the fallback message to avoid runtime
error.

Closes #31903

Signed-off-by: Toufik Benjaa (tbe) <tbe@odoo.com>


Co-authored-by: Marius Stedjan <marius@stedjan.com>

addons/website_sale/views/templates.xml

@@ -1604,8 +1604,7 @@
                         <span t-else="">An error occured while processing your payment. Please try again or contact your administrator.</span>
                     </t>
                     <t t-if="payment_tx_id.state == 'authorized'">
-                        <span t-if="payment_tx_id.acquirer_id.auth_msg" t-raw="payment_tx_id.acquirer_id.auth_msg"/>
-                        <span t-else="">Your payment has been authorized.</span>
+                        <span>Your payment has been authorized.</span>
                     </t>
                 </div>
                 <div t-if="payment_tx_id.acquirer_id.post_msg" t-att-class="'card-body %s' % (