[FIX] base: change logger type to 'warning' on format mismatch

If applied, this commit will handle the KeyError: res_id when the user tries to
import the translation of .csv file in settings -> translations, and if .csv
file doesn't have the res_id column.

I handled the traceback by changing the logger level to warning.

sentry - 4049419481

closes odoo/odoo#119511

Signed-off-by: Renilkumar Kajavadra (reka) <reka@odoo.com>