Allow importing the aws executors with a shorter path (apache#39093)

* Allow importing the aws executors with a shorter path

Import the aws executors in the __init__.py module of their
respective directories so that they can be imported with a shorter and
more natural looking module path.

For example, this modules path:

`airflow.providers.amazon.aws.executors.batch.batch_executor.AwsBatchExecutor`

Becomes:

`airflow.providers.amazon.aws.executors.batch.AwsBatchExecutor`

airflow/providers/amazon/aws/executors/batch/__init__.py

@@ -14,3 +14,8 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+from __future__ import annotations  # Added by precommit hooks
+
+__all__ = ["AwsBatchExecutor"]
+
+from airflow.providers.amazon.aws.executors.batch.batch_executor import AwsBatchExecutor

airflow/providers/amazon/aws/executors/ecs/__init__.py

@@ -14,3 +14,8 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+from __future__ import annotations  # Added by precommit hooks
+
+__all__ = ["AwsEcsExecutor"]
+
+from airflow.providers.amazon.aws.executors.ecs.ecs_executor import AwsEcsExecutor

tests/providers/amazon/aws/executors/batch/test_batch_executor.py

@@ -834,3 +834,8 @@ def test_submit_job_kwargs_exec_config_overrides(
         final_run_task_kwargs = executor._submit_job_kwargs(mock_ti_key, command, "queue", exec_config)
 
         assert final_run_task_kwargs == expected_result
+
+    def test_short_import_path(self):
+        from airflow.providers.amazon.aws.executors.batch import AwsBatchExecutor as AwsBatchExecutorShortPath
+
+        assert AwsBatchExecutor is AwsBatchExecutorShortPath

tests/providers/amazon/aws/executors/ecs/test_ecs_executor.py

@@ -1703,3 +1703,8 @@ def test_run_task_kwargs_exec_config_overrides(
         final_run_task_kwargs = executor._run_task_kwargs(mock_ti_key, command, "queue", exec_config)
 
         assert final_run_task_kwargs == expected_result
+
+    def test_short_import_path(self):
+        from airflow.providers.amazon.aws.executors.ecs import AwsEcsExecutor as AwsEcsExecutorShortPath
+
+        assert AwsEcsExecutor is AwsEcsExecutorShortPath