change StaticWeightList to optional

Signed-off-by: Garrybest <garrybest@foxmail.com>

charts/_crds/bases/policy.karmada.io_clusterpropagationpolicies.yaml

@@ -384,8 +384,6 @@ spec:
                               - weight
                               type: object
                             type: array
-                        required:
-                        - staticWeightList
                         type: object
                     type: object
                   spreadConstraints:

charts/_crds/bases/policy.karmada.io_propagationpolicies.yaml

@@ -380,8 +380,6 @@ spec:
                               - weight
                               type: object
                             type: array
-                        required:
-                        - staticWeightList
                         type: object
                     type: object
                   spreadConstraints:

charts/_crds/bases/policy.karmada.io_replicaschedulingpolicies.yaml

@@ -173,8 +173,6 @@ spec:
                       - weight
                       type: object
                     type: array
-                required:
-                - staticWeightList
                 type: object
               resourceSelectors:
                 description: ResourceSelectors used to select resources.

pkg/apis/policy/v1alpha1/replicascheduling_types.go

@@ -35,8 +35,8 @@ type ReplicaSchedulingSpec struct {
 // ClusterPreferences describes weight for each cluster or for each group of cluster.
 type ClusterPreferences struct {
 	// StaticWeightList defines the static cluster weight.
-	// +required
-	StaticWeightList []StaticClusterWeight `json:"staticWeightList"`
+	// +optional
+	StaticWeightList []StaticClusterWeight `json:"staticWeightList,omitempty"`
 	// DynamicWeight specifies the factor to generates dynamic weight list.
 	// If specified, StaticWeightList will be ignored.
 	// +kubebuilder:validation:Enum=AvailableReplicas