Remove deprecated `legacyBehavior` and `passHref` prop from `Link` component (#83003)
The `legacyBehavior` prop of the `Link` component has been deprecated
since #77473. For Next.js 16, we're finally removing support for it.
Consequently, we're also removing support for the `passHref` prop, which
was only useful in conjunction with the `legacyBehavior` prop.
A [codemod is
available](https://nextjs.org/docs/app/guides/upgrading/codemods#new-link)
to help you automatically upgrade your codebase.
reverts #77473
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Co-authored-by: Sebastian Sebbie Silbermann <sebastian.silbermann@vercel.com>