feat: add --labels for template subcommand

Signed-off-by: yxxhero <aiopsclub@163.com>

cmd/helm/template.go

@@ -200,6 +200,7 @@ func newTemplateCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 	f.StringVar(&kubeVersion, "kube-version", "", "Kubernetes version used for Capabilities.KubeVersion")
 	f.StringSliceVarP(&extraAPIs, "api-versions", "a", []string{}, "Kubernetes api versions used for Capabilities.APIVersions")
 	f.BoolVar(&client.UseReleaseName, "release-name", false, "use release name in the output-dir path.")
+	f.StringToStringVarP(&client.Labels, "labels", "l", nil, "Labels that would be added to release metadata. Should be divided by comma.")
 	bindPostRenderFlag(cmd, &client.PostRenderer)
 
 	return cmd