[FIX] website, *: fix tabs breaking when increasing number of columns

* web_editor

Previously, increasing the number of columns on the tabs snippet would
cause the newly created tabs to toggle the original tabs instead of its
own, this was caused by an oversight where the columns were clone
directly using jQuery, and the snippets' the onClone method was not
called on the newly created columns (here, tabs). This commit move the
responsibility to clone onto the SnippetsMenu so that it can create the
appropriate snippetEditor if needed and call its onClone method.

task-2070643

closes odoo/odoo#41125

Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>