Switch to github.com/coreos/go-systemd/v22 and drop older package

- We use the new v22 module released on May 10
- We drop the unmaintained `github.com/coreos/pkg`

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

cmd/kubelet/app/server.go

@@ -32,7 +32,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/coreos/go-systemd/daemon"
+	"github.com/coreos/go-systemd/v22/daemon"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 	"k8s.io/klog/v2"