[REF] *: BS5: Migrate btn-block

Due to the removal of btn-block we need to change the display to grid

> Dropped .btn-block for utilities. Instead of using .btn-block on the
> .btn, wrap your buttons with .d-grid and a .gap-* utility to space
> them as needed

https://getbootstrap.com/docs/5.1/migration/#buttons

Task ID: 2766483

Part-of: odoo/odoo#95450