[FIX] event_sale, website_event_sale: price tax included

Commit 5f5f8d8e introduces the possibility to display prices for B2B
or B2C channels, i.e. prices with taxes excluded or taxes included.

However, the module `event_sale` was not included in this improvement.
This is an issue since it is not possible to display the event ticket
prices with taxes included.

opw-702209