Test: Refactor test concurrency handling and add SDK chunk management tests (#8112)

### What problem does this PR solve?

- Improve concurrent test cases by using as_completed for better
reliability
- Rename variables for clarity (chunk_num -> count)
- Add new SDK API test suite for chunk management operations
- Update HTTP API tests with consistent concurrency patterns

### Type of change

- [x] Add test cases
- [x] Refactoring

test/testcases/test_http_api/test_dataset_mangement/test_create_dataset.py

@@ -85,7 +85,7 @@ class TestCapability:
             futures = [executor.submit(create_dataset, api_key, {"name": f"dataset_{i}"}) for i in range(count)]
         responses = list(as_completed(futures))
         assert len(responses) == count, responses
-        assert all(futures.result()["code"] == 0 for futures in futures)
+        assert all(future.result()["code"] == 0 for future in futures)
 
 
 @pytest.mark.usefixtures("clear_datasets")

test/testcases/test_http_api/test_dataset_mangement/test_delete_datasets.py

@@ -93,7 +93,7 @@ class TestCapability:
             futures = [executor.submit(delete_datasets, api_key, {"ids": ids[i : i + 1]}) for i in range(count)]
         responses = list(as_completed(futures))
         assert len(responses) == count, responses
-        assert all(futures.result()["code"] == 0 for futures in futures)
+        assert all(future.result()["code"] == 0 for future in futures)
 
 
 class TestDatasetsDelete:

test/testcases/test_http_api/test_dataset_mangement/test_list_datasets.py

@@ -49,7 +49,7 @@ class TestCapability:
             futures = [executor.submit(list_datasets, api_key) for i in range(count)]
         responses = list(as_completed(futures))
         assert len(responses) == count, responses
-        assert all(futures.result()["code"] == 0 for futures in futures)
+        assert all(future.result()["code"] == 0 for future in futures)
 
 
 @pytest.mark.usefixtures("add_datasets")

test/testcases/test_http_api/test_dataset_mangement/test_update_dataset.py

@@ -95,7 +95,7 @@ class TestCapability:
             futures = [executor.submit(update_dataset, api_key, dataset_id, {"name": f"dataset_{i}"}) for i in range(count)]
         responses = list(as_completed(futures))
         assert len(responses) == count, responses
-        assert all(futures.result()["code"] == 0 for futures in futures)
+        assert all(future.result()["code"] == 0 for future in futures)
 
 
 class TestDatasetUpdate: