[IMP] website_sale, *: keep track of products viewed

*= website, website_livechat, website_rating

///// Tracking Product /////

Now when a user browse products in eCommerce, we keep track of the
products he looked at. We use the website_visitor
to store the products viewed. A cookie is added with a TTl of 30 min it
will prevent the RPC for that time. We track the page only if the
product view is tracked.

The recently viewed products are displayed as a snippet but also
with the customize option in product pages of website_sale.

Products that are in cart will not be returned as recently viewed.

It is possible to add a recently viewed product to the cart directly
from the carousel, it will not redirect to the cart. If we are on the
cart page, the product is displayed in the cart.

The Visitor page in website now references products viewed

///// Tracking Page /////

Feature to track a view was remove in: https://github.com/odoo/enterprise/pull/4834



That feature is now reintroduced and will use website_track instead of
leads to be stored.

The track field is now on the view instead of the page.

url field is added to website.track, it will store the url for pages and
views

The Visitor page in website now references urls viewed

Add some tests

task-1984575

closes odoo/odoo#35810

Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>