Aligns the check for checkpointing being enabled with how it's done for the other Checkpoint-related components

Author: XComp

flink-runtime/src/test/java/org/apache/flink/runtime/scheduler/adaptive/AdaptiveSchedulerTest.java

@@ -94,6 +94,7 @@
 import org.apache.flink.runtime.scheduler.DefaultSchedulerTest;
 import org.apache.flink.runtime.scheduler.SchedulerBase;
 import org.apache.flink.runtime.scheduler.SchedulerNG;
+import org.apache.flink.runtime.scheduler.SchedulerTestingUtils;
 import org.apache.flink.runtime.scheduler.TestingPhysicalSlot;
 import org.apache.flink.runtime.scheduler.VertexParallelismInformation;
 import org.apache.flink.runtime.scheduler.VertexParallelismStore;
@@ -2228,6 +2229,7 @@ private AdaptiveScheduler createSchedulerThatReachesExecutingState(
                                                 .build(),
                                         null))
                         .build();
+        SchedulerTestingUtils.enableCheckpointing(jobGraph);
 
         // testing SlotPool instance that would allow for the scheduler to transition to Executing
         // state