[IMP] Add warning for direct '_' import in translations

[lef-adhoc]

More info here: odoo/odoo#174844

[pedrobaeza]

It's not true that it should be avoided. It's just that the other expression may be (not always) more performant, so I would rephrase the warning.

[lef-adhoc]

@pedrobaeza Got it! Can you tell me how would you reformulate it to add it?

[nilshamerlinck]

Suggested change

	from odoo import .*_: "[18] The '_' symbol should no longer be imported directly for translations. Remove '_' from the 'from odoo import' statement, and replace any instances of '_('text')' with 'self.env._('text')'. This change is required for better context handling. More details: https://github.com/odoo/odoo/pull/174844"
	from odoo(\.tools(\.translate)?)? import .*_: "[18] When possible, it is better to rely on `Env._`: replace '_('text')' by 'self.env._('text')' and remove '_' from the imports. More details: https://github.com/odoo/odoo/pull/174844"

[trisdoan]

Hi, there is no translation in my py file but it still produces the Warning

The file has these lines

from odoo import api, fields, models
from odoo.tools import float_compare, float_round