Commit [1] redefined the target in generic methods of snippet options so
that some buttons of the Design Tab snippet option could target a
different node than their parent option. This reverts that in favor of
the more generic `apply-to` data attribute.
[1]: c4bfedc37b
closes odoo/odoo#87325
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>