kubeRolloutRestart: Add generic restart function

As its name implies, the `kubeRestartDeployment` function would only
restart pods managed by a Deployment.  In order to restart pods managed
by other controllers, such as StatefulSets or DaemonSets, I've created a
new function, `kubeRolloutRestart`.  To preserve backward compatibility,
the `kubeRestartDeployment` function delegates to this new function.

vars/kubeRestartDeployment.groovy

@@ -1,34 +1,10 @@
-@groovy.transform.Field
-def POD_YAML = '''\
-spec:
-  containers:
-  - name: jnlp
-    volumeMounts:
-    - name: kubectl
-      mountPath: /bin/kubectl
-      readOnly: true
-  volumes:
-  - name: kubectl
-    hostPath:
-      path: /usr/bin/kubectl
-      type: File
-'''
-
 def call(args) {
     def namespace = args?.namespace
     def name = args?.name
 
-    if (name == null) {
-        name = env.JOB_NAME.split('/')[1]
-    }
-
-    if (namespace == null) {
-        namespace = name
-    }
-
-    podTemplate(yaml: POD_YAML) {
-        node(POD_LABEL) {
-            sh "kubectl rollout restart deployment -n ${namespace} ${name}"
-        }
-    }
+    kubeRolloutRestart(
+        kind: 'deployment',
+        namespace: namespace,
+        name: name,
+    )
 }

vars/kubeRolloutRestart.groovy

@@ -0,0 +1,39 @@
+@groovy.transform.Field
+def POD_YAML = '''\
+spec:
+  containers:
+  - name: jnlp
+    volumeMounts:
+    - name: kubectl
+      mountPath: /bin/kubectl
+      readOnly: true
+  volumes:
+  - name: kubectl
+    hostPath:
+      path: /usr/bin/kubectl
+      type: File
+'''
+
+def call(args) {
+    def kind = args?.kind
+    def namespace = args?.namespace
+    def name = args?.name
+
+    if (kind == null) {
+        kind = 'deployment'
+    }
+
+    if (name == null) {
+        name = env.JOB_NAME.split('/')[1]
+    }
+
+    if (namespace == null) {
+        namespace = name
+    }
+
+    podTemplate(yaml: POD_YAML) {
+        node(POD_LABEL) {
+            sh "kubectl rollout restart ${kind} -n ${namespace} ${name}"
+        }
+    }
+}