[BUG] Get tasks action does not refresh resource stats

[jed326]

Describe the bug
Task resource usage stats are currently refreshed in 2 places:

1. In the List Tasks action

   OpenSearch/server/src/main/java/org/opensearch/action/admin/cluster/node/tasks/list/TransportListTasksAction.java

   Line 119 in 7dddb31

   operation = operation.andThen(taskResourceTrackingService::refreshResourceStats);

2. By the SearchBackpressureService

   OpenSearch/server/src/main/java/org/opensearch/search/backpressure/SearchBackpressureService.java

   Lines 175 to 176 in 7dddb31

   	taskResourceTrackingService.refreshResourceStats(searchTasks.toArray(new Task[0]));
   	taskResourceTrackingService.refreshResourceStats(searchShardTasks.toArray(new Task[0]));

However, this is not done in the get tasks action: https://github.com/opensearch-project/OpenSearch/blob/main/server/src/main/java/org/opensearch/action/admin/cluster/node/tasks/get/TransportGetTaskAction.java

This means that if search backpressure is disabled, a user will not see any updates to the resource stats when only calling the get tasks API.

Expected behavior
Get tasks API should also update task resource usage stats.

[gaobinlong]

I've opened a PR for this bug, could anyone help to review?