CleanPath middleware does not work correctly with http CONNECT requests

If the same router handles REST API requests and http CONNECT requests, then it is not possible to use middleware.CleanPath. CleanPath will mess up `ctx.RoutePath` for typical http CONNECT URIs, which are of the format `host:port`. This causes go-chi to respond to CONNECT requests with 404 Not Found.

I need to use to a workaround like below to get it working. Fixing middleware.CleanPath to not do anything for CONNECT requests would be the correct fix.

```
package main

import (
"log"
"net/http"
"net/http/httputil"

"github.com/go-chi/chi/v5"
"github.com/go-chi/chi/v5/middleware"
)

func main() {
mux := chi.NewRouter()
mux.Use(middleware.CleanPath)
mux.Use(httpConnectMiddleWare)
mux.Method("GET", "/", http.HandlerFunc(ServeDefault))
mux.Method("CONNECT", "/*", http.HandlerFunc(ServeConnect))

http.ListenAndServe("127.0.0.1:8080", mux)
}

func httpConnectMiddleWare(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ctx := chi.RouteContext(r.Context())
if r.Method == http.MethodConnect {
ctx.RoutePath = "/"
}
next.ServeHTTP(w, r)
})
}

func ServeDefault(w http.ResponseWriter, r *http.Request) {
dump, _ := httputil.DumpRequest(r, false)
log.Printf("%s", string(dump))
}

func ServeConnect(w http.ResponseWriter, r *http.Request) {
dump, _ := httputil.DumpRequest(r, false)
log.Printf("%s", string(dump))
}
```

Start by inspecting middleware.CleanPath and the routing path used for CONNECT requests. Add a regression test using a CONNECT target in host:port form, then verify that CONNECT routing succeeds while ordinary paths continue to be cleaned correctly.

Written by the indexing model from the issue text.