[IMP] sale, utm: add sale statistics to utm campaign

PURPOSE

This commit removes the mass_mailing.campaign model. Instead of having a fully
fledged model, we will simply inherit utm.campaign. We will also add relevant
statistics on utm campaign model in order to use it in various applications.

SPECIFICATIONS

This commit adds revenue and quotations statistics on the
kanban and the form view of the utm.campaign

Kanban and form views will now display the invoiced_amount
and the number of quotations generated by the campaign.

TaskID: 2002029
PR: #34452