[Profiling] Use default task cancellation check

With this commit we remove our custom implementation of whether a
task has been cancelled and instead use the standard implementation that
is already provided by the task API.

x-pack/plugin/profiling/src/main/java/org/elasticsearch/xpack/profiling/TransportGetStackTracesAction.java

@@ -45,7 +45,6 @@
 import org.elasticsearch.search.sort.SortOrder;
 import org.elasticsearch.tasks.CancellableTask;
 import org.elasticsearch.tasks.Task;
-import org.elasticsearch.tasks.TaskCancelledException;
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 import org.elasticsearch.xcontent.ObjectPath;
@@ -155,22 +154,6 @@ protected void doExecute(Task submitTask, GetStackTracesRequest request, ActionL
         }
     }
 
-    /**
-     * Checks whether a task has been cancelled and notifies the provided listener if required.
-     * @param task The task to check. May be a cancelable task.
-     * @param listener Listener to notify.
-     * @return <code>true</code> iff the task has been cancelled. Callers must terminate as early as possible.
-     */
-    private boolean mayNotifyOfCancellation(Task task, ActionListener<GetStackTracesResponse> listener) {
-        if (task instanceof CancellableTask && ((CancellableTask) task).isCancelled()) {
-            log.info("{} got cancelled.", task);
-            listener.onFailure(new TaskCancelledException("get stacktraces task cancelled"));
-            return true;
-        } else {
-            return false;
-        }
-    }
-
     private void searchProfilingEvents(
         Task submitTask,
         Client client,
@@ -447,7 +430,7 @@ private void retrieveStackTraces(
         GetStackTracesResponseBuilder responseBuilder,
         ActionListener<GetStackTracesResponse> submitListener
     ) {
-        if (mayNotifyOfCancellation(submitTask, submitListener)) {
+        if (submitTask instanceof CancellableTask c && c.notifyIfCancelled(submitListener)) {
             return;
         }
         List<String> eventIds = new ArrayList<>(responseBuilder.getStackTraceEvents().keySet());
@@ -670,7 +653,7 @@ private void retrieveStackTraceDetails(
         List<String> executableIds,
         ActionListener<GetStackTracesResponse> submitListener
     ) {
-        if (mayNotifyOfCancellation(submitTask, submitListener)) {
+        if (submitTask instanceof CancellableTask c && c.notifyIfCancelled(submitListener)) {
             return;
         }
         List<Index> stackFrameIndices = resolver.resolve(