Honor redirect type in server actions (#70279)
Fixes #70216
### What?
The `redirect` function from `next/navigation` does not honor the
redirect type when used in server actions. When setting `type` to
`replace`, the server action pushes to history instead of replacing the
route. This stems from https://github.com/vercel/next.js/pull/54458
### Why?
The server action should honor the redirect type.
### How?
By setting `x-action-redirect` header to `<url>;<redirectType>`, we
extract the type of redirect to be performed on the client. This is
handled in a way that if the type is absent, we fallback to `push`.
Demo:
https://github.com/user-attachments/assets/3c84c6e3-2b08-4df3-89b2-5f9d290cc5ff
Observe that once the form is submitted and the action replaced the URL
with `/`, we didn't go back to the `/child` route.
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Co-authored-by: Zack Tanner <1939140+ztanner@users.noreply.github.com>
