metropolis/cli/pkg/context: replace with signal.NotifyContext

Change-Id: I457ccb83c7e25988755bb9463a8c83fc328a722b
Reviewed-on: https://review.monogon.dev/c/monogon/+/3081
Tested-by: Jenkins CI
Reviewed-by: Serge Bazanski <serge@monogon.tech>
diff --git a/metropolis/test/launch/cli/launch/main.go b/metropolis/test/launch/cli/launch/main.go
index ea856a1..53b65f9 100644
--- a/metropolis/test/launch/cli/launch/main.go
+++ b/metropolis/test/launch/cli/launch/main.go
@@ -20,8 +20,8 @@
 	"context"
 	"log"
 	"os"
+	"os/signal"
 
-	clicontext "source.monogon.dev/metropolis/cli/pkg/context"
 	apb "source.monogon.dev/metropolis/proto/api"
 	"source.monogon.dev/metropolis/test/launch"
 	"source.monogon.dev/metropolis/test/launch/cluster"
@@ -47,7 +47,7 @@
 	for _, p := range cluster.NodePorts {
 		ports = append(ports, uint16(p))
 	}
-	ctx := clicontext.WithInterrupt(context.Background())
+	ctx, _ := signal.NotifyContext(context.Background(), os.Interrupt)
 	doneC := make(chan error)
 	err = cluster.LaunchNode(ctx, ld, sd, &cluster.NodeOptions{
 		Name:       "test-node",