[KYUUBI #3860] [K8S] Add service account name in values.yaml to config kyuubi's serviceAccountName in helm template file

### _Why are the changes needed?_

For kyuubi run in kubernetes, kyuubi need permissions to create/list/delete pods.

Kubernetes provides serviceAccountName for quick configuration of permissions(Get details in [RBAC](https://kubernetes.io/docs/reference/access-authn-authz/rbac/)).

Add `serviceAccoutName` to the values.yaml file to help users add configurations without changing the template file.

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [x] [Run test](https://kyuubi.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request

![WX20221128-114911](https://user-images.githubusercontent.com/52876270/204190111-b463239f-0427-4197-b3b4-e2a3a0bdf7ad.png)

Closes #3860 from zwangsheng/kubernetes/serviceAccount.

Closes #3860

e87bcb69 [zwangsheng] [K8S] Add service account name in values.yaml for kyuubi's serviceAccountName

Authored-by: zwangsheng <2213335496@qq.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>

docker/helm/templates/kyuubi-deployment.yaml

@@ -35,6 +35,9 @@ spec:
         app: {{ template "kyuubi.name" . }}
         release: {{ .Release.Name }}
     spec:
+      {{- if .Values.serviceAccount }}
+      serviceAccountName: {{ .Values.serviceAccount.name }}
+      {{- end}}
       containers:
         - name: kyuubi-server
           image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"

docker/helm/values.yaml

@@ -28,6 +28,10 @@ image:
   # Overrides the image tag whose default is the chart appVersion.
   tag: "master-snapshot"
 
+# ServiceAccount used for Kyuubi create/list/delete pod in kubernetes
+serviceAccount:
+  name: default
+
 probe:
   liveness:
     enabled: true