[16.0] l10n_eu_nace - migration script

[edlopen]

I'm working on a migration script for that module as I forgot to add one when I migrated the module. Hopefully on Monday I'll push a PR for this issue.

[Lukwos]

I suppose this issue is related to this merged PR : #205

@edlopen I got an error from this migration script if '_ir_translation' does not exist

File "/usr/local/lib/python3.10/dist-packages/odoo/addons/l10n_eu_nace/migrations/16.0.1.0.0/pre-migrate.py", line 26, in migrate
    cr.execute(
  File "/usr/lib/python3/dist-packages/odoo/sql_db.py", line 321, in execute
    res = self._obj.execute(query, params)
psycopg2.errors.UndefinedTable: relation "_ir_translation" does not exist
LINE 6:             FROM _ir_translation it

I think it's related to this: https://oca.github.io/openupgradelib/API.html#openupgradelib.openupgrade_160.migrate_translations_to_jsonb