Fix elasticsearch provider to use SDK imports for Airflow 3.2+ (#64931)

Update es_task_handler.py to import timezone and import_string from
airflow.sdk when running on Airflow 3.2+, with backwards-compatible
fallback to airflow.utils for older versions. Keep FileTaskHandler
and LoggingMixin imports from airflow.utils.log as they remain there.

Author: potiuk

providers/elasticsearch/src/airflow/providers/elasticsearch/log/es_task_handler.py

@@ -46,13 +46,14 @@
 from airflow.providers.elasticsearch.log.es_json_formatter import ElasticsearchJSONFormatter
 from airflow.providers.elasticsearch.log.es_response import ElasticSearchResponse, Hit, resolve_nested
 from airflow.providers.elasticsearch.version_compat import AIRFLOW_V_3_0_PLUS, AIRFLOW_V_3_2_PLUS
-from airflow.utils import timezone
 from airflow.utils.log.file_task_handler import FileTaskHandler
 from airflow.utils.log.logging_mixin import ExternalLoggingMixin, LoggingMixin
 
 if AIRFLOW_V_3_2_PLUS:
     from airflow._shared.module_loading import import_string
+    from airflow.sdk import timezone
 else:
+    from airflow.utils import timezone  # type: ignore[attr-defined,no-redef]
     from airflow.utils.module_loading import import_string  # type: ignore[no-redef]
 
 if TYPE_CHECKING: