Having _lt in the env doesn't make much sense, as it is useless
at run time, and it would incite people to require 'web.env' to
use it (at load time). The env should never be directly imported,
it is automatically propagated from parents to children.
To sum up, in Owl components:
- when terms have to be translated at run time (e.g. in a function
called when the user clicks on a button), the env is available
and env._t must be used
- when terms have to be translated at load time (e.g. a JS module
defining a component with a translatable static property), one
must require 'web.translation' and use function _lt it exports.
closesodoo/odoo#50656
Signed-off-by: Géry Debongnie (ged) <ged@openerp.com>