feat: Plugin server supports k8s deployment and configures the default download URL of the plugin(#2232, #2280,#2312) (#2389)

Co-authored-by: xujingfeng <jingfeng.xjf@alibaba-inc.com>
Co-authored-by: 澄潭 <zty98751@alibaba-inc.com>

helm/core/values.yaml

@@ -11,6 +11,7 @@ global:
   enableSRDS: true
   # -- Whether to enable Redis(redis-stack-server) for Higress, default is false.
   enableRedis: false
+  enablePluginServer: false
   onDemandRDS: false
   hostRDSMergeSubset: false
   onlyPushRouteCluster: true
@@ -767,4 +768,31 @@ redis:
       accessModes:
         - ReadWriteOnce
       # -- Persistent Volume size
-      size: 1Gi
+      size: 1Gi
+
+pluginServer:
+  name: "higress-plugin-server"
+  # -- Number of Higress Plugin Server pods, 2 recommended for high availability
+  replicas: 2
+  image: plugin-server
+
+  hub: higress-registry.cn-hangzhou.cr.aliyuncs.com/higress
+  tag: ""
+
+  imagePullSecrets: []
+
+  labels: {}
+  # -- Labels to apply to the pod
+  podLabels: {}
+
+  #  Plugin-server Service configuration
+  service:
+    port: 80                    # Container target port (usually fixed)
+
+  resources:
+    requests:
+      cpu: 200m
+      memory: 128Mi
+    limits:
+      cpu: 500m
+      memory: 256Mi