Add hooks to be able to tweak the Bank customer ID number for ISR-B
Those hooks will allow to not use of the field l10n_ch_postal for
multiple purposes.
Fixes conditions on which the reference is generated.
It shouldn't be always generated if l10n_ch_postal is set.
Only if a l10n_ch_subscription_xxx is set.
closesodoo/odoo#58398
X-original-commit: 4790b8e57aa357cda32818392d795b8c0dc48f43
Signed-off-by: oco-odoo <oco-odoo@users.noreply.github.com>
Signed-off-by: Christophe Monniez (moc) <moc@odoo.com>
