[FIX] website: menu translation on website

Currently, the menu are only translated for installed language when we
create a new website.

When we create a new menu (eg. by installing a module) or install a new
language we will only translate menu without website_id set, so the menu
are not translated.

With this changeset, we try to match translation of menu without
website_id to menu with website_id when translations are updated:

- when a language is installed/updated
- when a module is installed/updated

Without the changeset, the added test would fail with:

- "Menu in english" != "Menu en français"
  Load translation add missing translation from template menu

- "Menu in french" != "Menu en français"
  Load translation with overwriting update existing menu from template

fixes #43365
opw-2209864
closes #48031

closes odoo/odoo#50463

X-original-commit: 93377cc4
Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>