[FIX] payment: use correct target on onclick event

Current behavior :
If we click on the icon rather than the label we got a crash

Steps to reproduce :
- Enable Online Payment and configure an acquirer and add the possibility to save the card
- Go to the Website and Log in (e.g. as `Marc Demo`)
- Go to your account (from dropdown menu > `My Account`)
- Manage you payment methods and add a new one
- Try to delete the newly added payment method by clicking on the trash icon in the button

Reason :
Currently, we rely on the `target` property of the event (triggered after clicking on the button).
The problem is that, as in this case, if a button has an HTML element as a child and we click on this child, `target` property will target the child whereas in this case we want to retrieve the button and not the child.

Using `currentTarget` property instead of `target` allows us to retrieve the button no matter what since `currentTarget` always refers to the element to which the event handler has been attached.

OPW-2660186

closes odoo/odoo#80253

X-original-commit: e8ec4fb6aa9ee4796d486a3d32e6a9a5e1382548
Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>
Signed-off-by: Claude Thibault (thcl) <thcl@odoo.com>

addons/payment/static/src/js/manage_form.js

@@ -171,7 +171,7 @@ odoo.define('payment.manage_form', require => {
             ev.preventDefault();
 
             // Extract contextual values from the delete button
-            const linkedRadio = $(ev.target).siblings().find('input[name="o_payment_radio"]')[0];
+            const linkedRadio = $(ev.currentTarget).siblings().find('input[name="o_payment_radio"]')[0];
             const tokenId = this._getPaymentOptionIdFromRadio(linkedRadio);
 
             // Delete the token