[FLINK-33653][runtime] Introduce a benchmark for balanced tasks scheduling.

Broaden the access scope for classes associated with the balanced task scheduling benchmark.

Author: RocMarshal

flink-runtime/src/main/java/org/apache/flink/runtime/jobmaster/slotpool/PendingRequest.java

@@ -32,7 +32,7 @@
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 
-final class PendingRequest implements WeightLoadable {
+public final class PendingRequest implements WeightLoadable {
 
     private final SlotRequestId slotRequestId;
 
@@ -72,7 +72,7 @@ static PendingRequest createBatchRequest(
                 slotRequestId, resourceProfile, loadingWeight, preferredAllocations, true);
     }
 
-    static PendingRequest createNormalRequest(
+    public static PendingRequest createNormalRequest(
             SlotRequestId slotRequestId,
             ResourceProfile resourceProfile,
             LoadingWeight loadingWeight,

flink-runtime/src/main/java/org/apache/flink/runtime/jobmaster/slotpool/PhysicalSlotRequest.java

@@ -65,7 +65,7 @@ public boolean willSlotBeOccupiedIndefinitely() {
         return slotWillBeOccupiedIndefinitely;
     }
 
-    PendingRequest toPendingRequest() {
+    public PendingRequest toPendingRequest() {
         return slotWillBeOccupiedIndefinitely
                 ? PendingRequest.createNormalRequest(
                         slotRequestId,

flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/LocalInputPreferredSlotSharingStrategy.java

@@ -47,7 +47,7 @@
  * belong to the same SlotSharingGroup, tend to be put in the same ExecutionSlotSharingGroup.
  * Co-location constraints will be respected.
  */
-class LocalInputPreferredSlotSharingStrategy extends AbstractSlotSharingStrategy {
+public class LocalInputPreferredSlotSharingStrategy extends AbstractSlotSharingStrategy {
 
     LocalInputPreferredSlotSharingStrategy(
             final SchedulingTopology topology,
@@ -56,7 +56,7 @@ class LocalInputPreferredSlotSharingStrategy extends AbstractSlotSharingStrategy
         super(topology, logicalSlotSharingGroups, coLocationGroups);
     }
 
-    static class Factory implements SlotSharingStrategy.Factory {
+    public static class Factory implements SlotSharingStrategy.Factory {
 
         public LocalInputPreferredSlotSharingStrategy create(
                 final SchedulingTopology topology,

flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/SlotSharingStrategy.java

@@ -26,7 +26,7 @@
 import java.util.Set;
 
 /** Strategy which determines {@link ExecutionSlotSharingGroup} for each execution vertex. */
-interface SlotSharingStrategy {
+public interface SlotSharingStrategy {
 
     ExecutionSlotSharingGroup getExecutionSlotSharingGroup(ExecutionVertexID executionVertexId);
 

flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/TaskBalancedPreferredSlotSharingStrategy.java

@@ -35,7 +35,7 @@
  * the same SlotSharingGroup, tend to be put evenly in each ExecutionSlotSharingGroup. Co-location
  * constraints will be respected.
  */
-class TaskBalancedPreferredSlotSharingStrategy extends AbstractSlotSharingStrategy {
+public class TaskBalancedPreferredSlotSharingStrategy extends AbstractSlotSharingStrategy {
 
     public static final Logger LOG =
             LoggerFactory.getLogger(TaskBalancedPreferredSlotSharingStrategy.class);
@@ -57,7 +57,7 @@ protected Map<ExecutionVertexID, ExecutionSlotSharingGroup> computeExecutionSlot
                 .build();
     }
 
-    static class Factory implements SlotSharingStrategy.Factory {
+    public static class Factory implements SlotSharingStrategy.Factory {
 
         public TaskBalancedPreferredSlotSharingStrategy create(
                 final SchedulingTopology topology,