Previous commit is fixing the code so that a view without `en_US` in
arch_db jsonb value won't make the code crash (`get_related_views`).
The commit before that actually improved the custom snippets so the
translations are forwarded to it when it's saved.
But that new code was introducing a way to have an arch without `en_US`
value, which led to the bug described above.
While the previous commit fixed the consequence of the issue, this
commit solves the root cause of the issue, introduced 2 commits before.
Arguably, this commit could be squashed in the one 2 commits ago, but
it makes things more clear to figure.
task-3375518
closesodoo/odoo#150945
X-original-commit: bf598d9098b4be36542a9a91c0dd1055cf36aed5
Signed-off-by: Romain Derie (rde) <rde@odoo.com>