Migrate from urfave/cli to cobra (#426)

* wip

* env var fix

* cluster create

* cluster create and delete

* cluster list

* cluster cmd

* kubeconfig

* policy create

* policy delete and list, and added root commands

* removed urfavecli from k3kcli

* fix policy command

* k3k-kubelet to cobra

* updated docs

* updated go.mod

* updated test

* added deletion

* added cleanup and flake attempts

* wip bind env

* simplified config

pkg/controller/cluster/agent/shared.go

@@ -25,9 +25,8 @@ import (
 )
 
 const (
-	sharedKubeletConfigPath = "/opt/rancher/k3k/config.yaml"
-	SharedNodeAgentName     = "kubelet"
-	SharedNodeMode          = "shared"
+	SharedNodeAgentName = "kubelet"
+	SharedNodeMode      = "shared"
 )
 
 type SharedAgent struct {
@@ -208,10 +207,6 @@ func (s *SharedAgent) podSpec() v1.PodSpec {
 				Resources: v1.ResourceRequirements{
 					Limits: v1.ResourceList{},
 				},
-				Args: []string{
-					"--config",
-					sharedKubeletConfigPath,
-				},
 				Env: append([]v1.EnvVar{
 					{
 						Name: "AGENT_HOSTNAME",