fix: Put back type for NavigateOptions.scroll (#59001)

It seems like in
24b2ff1#diff-421107ce62efb02560358d25c5eb086d5d82d2ad1c7c4929ebfb768c2ea1c973
`forceOptimisticNavigation` was removed, but the `@internal` flag that
was originally assigned to this option remained in place.

Due to this, it seems like `scroll` is missing in the built types (see
[`app-router-context.shared-runtime.d.ts` in the latest
canary](https://unpkg.com/browse/next@14.0.4-canary.18/dist/shared/lib/app-router-context.shared-runtime.d.ts)).

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Co-authored-by: Zack Tanner <zacktanner@gmail.com>

packages/next/src/shared/lib/app-router-context.shared-runtime.ts

@@ -68,7 +68,6 @@ export type CacheNode =
     }
 
 export interface NavigateOptions {
-  /** @internal */
   scroll?: boolean
 }