[FIX] website_sale,payment[adyen,authorize]: Block UI only on click pay

Step to reproduce:

  - Install website_sale module
  - Go to the shop
  - Add a product to the cart and proceed to checkout
  - Click on Customize and activate `Accept Terms & Conditions`
  - Deactivate the `Accept Terms & Conditions` or click on a
    payment method.

Issue:

  UI freeze.

Solution:

  Freeze ui only when clicking on pay button.
  Unfreeze only if payment process fails (or when displaying an error).
  Revert of https://github.com/odoo/odoo/commit/41b91e12eb80cee08e3a25bcc6546ef34937d8cf

 and adapt it correctly

opw-2702798

closes odoo/odoo#81661

Related: odoo/enterprise#23560
Signed-off-by: Nasreddin Boulif (bon) <bon@odoo.com>