Before this commit, products relying on values of template fields (i.e. image) were not considered updated when their fallback template field was updated. After this commit, upon update of a template image, all products that would fallback on that template are "touched". This avoids side-effects such as displaying an outdated template image in the e-commerce for a given product. task-2477438 closes odoo/odoo#71139 Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>