[REV] web: list: display help in header cell tooltip

This reverts commit 3ea179e03c938222d88e32cbb5accacdfcef78c6.

SBU requested to revert this task
https://www.odoo.com/web#id=2036832&model=project.task&view_type=form&menu_id=4720



closes odoo/odoo#35298

Signed-off-by: VincentSchippefilt <VincentSchippefilt@users.noreply.github.com>