Update the API of schedule priroity feature as per the MVP version

Signed-off-by: RainbowMango <qdurenhongcai@gmail.com>

api/openapi-spec/swagger.json

@@ -19302,12 +19302,14 @@
       ],
       "properties": {
         "priorityClassName": {
-          "description": "PriorityClassName specifies which PriorityClass to use. Its behavior depends on PriorityClassSource:\n\nBehavior of PriorityClassName:\n\nFor KubePriorityClass: - When specified: Uses the named Kubernetes PriorityClass. - When empty: Uses the cluster's default PriorityClass (i.e., the PriorityClass marked as the global default in the cluster). - If neither exists: Sets priority=0 and preemptionPolicy=Never.\n\nFor PodPriorityClass: - Uses PriorityClassName from the PodTemplate. - If the specified PriorityClass is not found, falls back to the cluster's default PriorityClass\n  (i.e., the PriorityClass marked as the global default in the cluster).\n- If no valid PriorityClass is found: Sets priority=0 and preemptionPolicy=Never. - Not yet implemented.\n\nFor FederatedPriorityClass: - Not yet implemented.",
+          "description": "PriorityClassName specifies which PriorityClass to use. Its behavior depends on PriorityClassSource:\n\nBehavior of PriorityClassName:\n\nFor KubePriorityClass: - When specified: Uses the named Kubernetes PriorityClass.\n\nFor PodPriorityClass: - Uses PriorityClassName from the PodTemplate. - Not yet implemented.\n\nFor FederatedPriorityClass: - Not yet implemented.",
-          "type": "string"
+          "type": "string",
+          "default": ""
         },
         "priorityClassSource": {
           "description": "PriorityClassSource specifies where Karmada should look for the PriorityClass definition. Available options: - KubePriorityClass: Uses Kubernetes PriorityClass (scheduling.k8s.io/v1) - PodPriorityClass: Uses PriorityClassName from PodTemplate: PodSpec.PriorityClassName (not yet implemented) - FederatedPriorityClass: Uses Karmada FederatedPriorityClass (not yet implemented)",
-          "type": "string"
+          "type": "string",
+          "default": ""
         }
       }
     },

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

@@ -888,14 +888,9 @@ spec:
 
                       For KubePriorityClass:
                       - When specified: Uses the named Kubernetes PriorityClass.
-                      - When empty: Uses the cluster's default PriorityClass (i.e., the PriorityClass marked as the global default in the cluster).
-                      - If neither exists: Sets priority=0 and preemptionPolicy=Never.
 
                       For PodPriorityClass:
                       - Uses PriorityClassName from the PodTemplate.
-                      - If the specified PriorityClass is not found, falls back to the cluster's default PriorityClass
-                        (i.e., the PriorityClass marked as the global default in the cluster).
-                      - If no valid PriorityClass is found: Sets priority=0 and preemptionPolicy=Never.
                       - Not yet implemented.
 
                       For FederatedPriorityClass:

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

@@ -885,14 +885,9 @@ spec:
 
                       For KubePriorityClass:
                       - When specified: Uses the named Kubernetes PriorityClass.
-                      - When empty: Uses the cluster's default PriorityClass (i.e., the PriorityClass marked as the global default in the cluster).
-                      - If neither exists: Sets priority=0 and preemptionPolicy=Never.
 
                       For PodPriorityClass:
                       - Uses PriorityClassName from the PodTemplate.
-                      - If the specified PriorityClass is not found, falls back to the cluster's default PriorityClass
-                        (i.e., the PriorityClass marked as the global default in the cluster).
-                      - If no valid PriorityClass is found: Sets priority=0 and preemptionPolicy=Never.
                       - Not yet implemented.
 
                       For FederatedPriorityClass:

pkg/apis/policy/v1alpha1/propagation_types.go

@@ -688,7 +688,7 @@ type SchedulePriority struct {
 	//
 	// +kubebuilder:validation:Enum=KubePriorityClass
 	// +required
-	PriorityClassSource PriorityClassSource `json:"priorityClassSource,omitempty"`
+	PriorityClassSource PriorityClassSource `json:"priorityClassSource"`
 
 	// PriorityClassName specifies which PriorityClass to use. Its behavior depends on PriorityClassSource:
 	//
@@ -696,21 +696,16 @@ type SchedulePriority struct {
 	//
 	// For KubePriorityClass:
 	// - When specified: Uses the named Kubernetes PriorityClass.
-	// - When empty: Uses the cluster's default PriorityClass (i.e., the PriorityClass marked as the global default in the cluster).
-	// - If neither exists: Sets priority=0 and preemptionPolicy=Never.
 	//
 	// For PodPriorityClass:
 	// - Uses PriorityClassName from the PodTemplate.
-	// - If the specified PriorityClass is not found, falls back to the cluster's default PriorityClass
-	//   (i.e., the PriorityClass marked as the global default in the cluster).
-	// - If no valid PriorityClass is found: Sets priority=0 and preemptionPolicy=Never.
 	// - Not yet implemented.
 	//
 	// For FederatedPriorityClass:
 	// - Not yet implemented.
 	//
 	// +required
-	PriorityClassName string `json:"priorityClassName,omitempty"`
+	PriorityClassName string `json:"priorityClassName"`
 }
 
 // PriorityClassSource defines the type for PriorityClassSource field.

pkg/generated/openapi/zz_generated.openapi.go

@@ -5151,13 +5151,15 @@ func schema_pkg_apis_policy_v1alpha1_SchedulePriority(ref common.ReferenceCallba
 					"priorityClassSource": {
 						SchemaProps: spec.SchemaProps{
 							Description: "PriorityClassSource specifies where Karmada should look for the PriorityClass definition. Available options: - KubePriorityClass: Uses Kubernetes PriorityClass (scheduling.k8s.io/v1) - PodPriorityClass: Uses PriorityClassName from PodTemplate: PodSpec.PriorityClassName (not yet implemented) - FederatedPriorityClass: Uses Karmada FederatedPriorityClass (not yet implemented)",
+							Default:     "",
 							Type:        []string{"string"},
 							Format:      "",
 						},
 					},
 					"priorityClassName": {
 						SchemaProps: spec.SchemaProps{
-							Description: "PriorityClassName specifies which PriorityClass to use. Its behavior depends on PriorityClassSource:\n\nBehavior of PriorityClassName:\n\nFor KubePriorityClass: - When specified: Uses the named Kubernetes PriorityClass. - When empty: Uses the cluster's default PriorityClass (i.e., the PriorityClass marked as the global default in the cluster). - If neither exists: Sets priority=0 and preemptionPolicy=Never.\n\nFor PodPriorityClass: - Uses PriorityClassName from the PodTemplate. - If the specified PriorityClass is not found, falls back to the cluster's default PriorityClass\n  (i.e., the PriorityClass marked as the global default in the cluster).\n- If no valid PriorityClass is found: Sets priority=0 and preemptionPolicy=Never. - Not yet implemented.\n\nFor FederatedPriorityClass: - Not yet implemented.",
+							Description: "PriorityClassName specifies which PriorityClass to use. Its behavior depends on PriorityClassSource:\n\nBehavior of PriorityClassName:\n\nFor KubePriorityClass: - When specified: Uses the named Kubernetes PriorityClass.\n\nFor PodPriorityClass: - Uses PriorityClassName from the PodTemplate. - Not yet implemented.\n\nFor FederatedPriorityClass: - Not yet implemented.",
+							Default:     "",
 							Type:        []string{"string"},
 							Format:      "",
 						},