[KYUUBI #5631] [K8S][HELM] Set session affinity if needed in helm chart

### _Why are the changes needed?_
This can ensure that incoming requests from same client are forward to the same Kyuubi service instance in K8S. So this may be a workaround for users to get their session states during a period of time.

### _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

- [ ] [Run test](https://kyuubi.readthedocs.io/en/master/contributing/code/testing.html#running-tests) locally before make a pull request

### _Was this patch authored or co-authored using generative AI tooling?_

No.

Closes #5631 from zhaohehuhu/dev-1106.

Closes #5631

ba1a733 [Cheng Pan] comments
6f9d629 [hezhao2] reformat
db9e842 [hezhao2] take toYaml approach
d94354d [hezhao2] refactor
c5f055a [hezhao2] sync
8695532 [hezhao2] set session affinity if needed

Lead-authored-by: hezhao2 <hezhao2@cisco.com>
Co-authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>

Author: zhaohehuhu

charts/kyuubi/templates/kyuubi-service.yaml

@@ -37,6 +37,12 @@ spec:
       {{- end }}
   selector:
     {{- include "kyuubi.selectorLabels" $ | nindent 4 }}
+  {{- if ($frontend.service.sessionAffinity) }}
+  sessionAffinity: {{ $frontend.service.sessionAffinity }}
+  {{- end }}
+  {{- with $frontend.service.sessionAffinityConfig }}
+  sessionAffinityConfig: {{- toYaml . | nindent 4 }}
+  {{- end }}
 ---
 {{- end }}
 {{- end }}

charts/kyuubi/values.yaml

@@ -85,6 +85,13 @@ server:
       port: "{{ .Values.server.thriftBinary.port }}"
       nodePort: ~
       annotations: {}
+      # candidates are ClientIP or None
+      # https://kubernetes.io/docs/reference/kubernetes-api/service-resources/service-v1/
+      sessionAffinity: ~
+      sessionAffinityConfig: {}
+      #  sessionAffinityConfig:
+      #    clientIP:
+      #      timeoutSeconds: 10800
 
   # Thrift HTTP protocol (HiveServer2 compatible)
   thriftHttp:
@@ -95,6 +102,13 @@ server:
       port: "{{ .Values.server.thriftHttp.port }}"
       nodePort: ~
       annotations: {}
+      # candidates are ClientIP or None
+      # https://kubernetes.io/docs/reference/kubernetes-api/service-resources/service-v1/
+      sessionAffinity: ~
+      sessionAffinityConfig: {}
+      #  sessionAffinityConfig:
+      #    clientIP:
+      #      timeoutSeconds: 10800
 
   # REST API protocol (experimental)
   rest:
@@ -105,6 +119,13 @@ server:
       port: "{{ .Values.server.rest.port }}"
       nodePort: ~
       annotations: {}
+      # candidates are ClientIP or None
+      # https://kubernetes.io/docs/reference/kubernetes-api/service-resources/service-v1/
+      sessionAffinity: ~
+      sessionAffinityConfig: {}
+      #  sessionAffinityConfig:
+      #    clientIP:
+      #      timeoutSeconds: 10800
 
   # MySQL compatible text protocol (experimental)
   mysql:
@@ -115,6 +136,13 @@ server:
       port: "{{ .Values.server.mysql.port }}"
       nodePort: ~
       annotations: {}
+      # candidates are ClientIP or None
+      # https://kubernetes.io/docs/reference/kubernetes-api/service-resources/service-v1/
+      sessionAffinity: ~
+      sessionAffinityConfig: {}
+      #  sessionAffinityConfig:
+      #    clientIP:
+      #      timeoutSeconds: 10800
 
 monitoring:
   # Exposes metrics in Prometheus format