scion-pki: use dispatcher path for probing

Enable the path probing in the scion-pki tool to use the dispatcher
path from the env flags.

GitOrigin-RevId: c2dfbe020eeb760c420ef6ce8373413286db3788

go/pkg/app/path/path.go

@@ -122,6 +122,7 @@ func filterUnhealthy(
 		LocalIP:                cfg.LocalIP,
 		ID:                     uint16(rand.Uint32()),
 		SCIONPacketConnMetrics: cfg.SCIONPacketConnMetrics,
+		Dispatcher:             cfg.Dispatcher,
 	}.GetStatuses(subCtx, nonEmptyPaths)
 	if err != nil {
 		return nil, serrors.WrapStr("probing paths", err)
@@ -281,8 +282,10 @@ func (cs ColorScheme) Path(path snet.Path) string {
 }
 
 type ProbeConfig struct {
-	LocalIA addr.IA
-	LocalIP net.IP
+	LocalIA    addr.IA
+	LocalIP    net.IP
+	Dispatcher string
+
 	// Metrics injected into Prober.
 	SCIONPacketConnMetrics snet.SCIONPacketConnMetrics
 }

go/scion-pki/certs/renew.go

@@ -346,8 +346,9 @@ The template is expressed in JSON. A valid example:
 			}
 			if !flags.noProbe {
 				pathOpts = append(pathOpts, path.WithProbing(&path.ProbeConfig{
-					LocalIA: info.IA,
-					LocalIP: localIP,
+					LocalIA:    info.IA,
+					LocalIP:    localIP,
+					Dispatcher: dispatcher,
 				}))
 			}
 			path, err := path.Choose(ctx, sd, ca, pathOpts...)

go/scion/ping.go

@@ -128,8 +128,9 @@ On other errors, ping will exit with code 2.
 			}
 			if flags.healthyOnly {
 				opts = append(opts, path.WithProbing(&path.ProbeConfig{
-					LocalIA: info.IA,
-					LocalIP: localIP,
+					LocalIA:    info.IA,
+					LocalIP:    localIP,
+					Dispatcher: dispatcher,
 				}))
 			}
 			path, err := path.Choose(traceCtx, sd, remote.IA, opts...)