Navigation-Item button+menu missing `aria-controls`

The [`<button>`](https://github.com/db-ux-design-system/core-web/blob/main/packages/components/src/components/navigation-item/navigation-item.lite.tsx#L119-L124) inside `<DBNavigationItem>` is missing `aria-controls` for `<menu>`

_Originally posted by @nmerget in https://github.com/db-ux-design-system/core-web/pull/4797#discussion_r2788252252_
            