Commit 850e1675eb improved the website.menu creation on module install
(eg: /shop for website_sale).
This commit aims to do the same on module uninstall.
Before this commit:
Uninstalling a website module would uninstall its website.menu (/shop) stored
on the default menu tree.
But the copies of that default menu, on websites, would remains.
Indeed, there is no direct link between the default menus and its copies.
More annoyingly, installing that website module again after uninstalling it
would create a new copy of the default menu, resulting in multiple same menus
on website.
Now, if the menu to be uninstalled is in the default tree menu, we remove all
its copies (the website.menu having that same URL).
Closes#27488, closes#27721
Romain Derie
b48d2b6b5e