Ensure we normalize .rsc/.prefetch.rsc (#80409)
When we match a `.rsc` or `.prefetch.rsc` path we need to normalize the
URL used to not include this as it could leak through to the canonical
URL used for rendering and with `usePathname()`.
x-ref: [slack
thread](https://vercel.slack.com/archives/C08VDSLKNVC/p1749551233763969)
