implement ippool

1. support vlan ippool management
2. support calico ippool management

Signed-off-by: Duan Jiong <djduanjiong@gmail.com>

config/crds/network.kubesphere.io_ipamblocks.yaml

@@ -0,0 +1,79 @@
+
+---
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  creationTimestamp: null
+  name: ipamblocks.network.kubesphere.io
+spec:
+  group: network.kubesphere.io
+  names:
+    kind: IPAMBlock
+    plural: ipamblocks
+  scope: Cluster
+  validation:
+    openAPIV3Schema:
+      properties:
+        apiVersion:
+          description: 'APIVersion defines the versioned schema of this representation
+            of an object. Servers should convert recognized schemas to the latest
+            internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources'
+          type: string
+        kind:
+          description: 'Kind is a string value representing the REST resource this
+            object represents. Servers may infer this from the endpoint the client
+            submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
+          type: string
+        metadata:
+          description: Standard object's metadata.
+          type: object
+        spec:
+          description: Specification of the IPAMBlock.
+          properties:
+            allocations:
+              items:
+                type: integer
+                nullable: true
+              type: array
+            attributes:
+              items:
+                properties:
+                  handle_id:
+                    type: string
+                  secondary:
+                    additionalProperties:
+                      type: string
+                    type: object
+                type: object
+              type: array
+            cidr:
+              type: string
+            deleted:
+              type: boolean
+            id:
+              format: int32
+              type: integer
+            unallocated:
+              items:
+                type: integer
+              type: array
+          required:
+          - allocations
+          - attributes
+          - cidr
+          - deleted
+          - id
+          - unallocated
+          type: object
+      type: object
+  version: v1alpha1
+  versions:
+  - name: v1alpha1
+    served: true
+    storage: true
+status:
+  acceptedNames:
+    kind: ""
+    plural: ""
+  conditions: []
+  storedVersions: []