Clean up of some demo data that was referring to old demo data
names/prices. Also add extra demo data so we can have some
stock.valuation.layer values and some data points for enterprise
level reports.
Part 3.3 of task: 2440068
ENT PR: odoo/enterprise#20169closesodoo/odoo#74951
Related: odoo/upgrade#2727
Signed-off-by: Rémy Voet <ryv-odoo@users.noreply.github.com>