Deprecate get_hook method in DockerOperator (#34432)

* Deprecate get_hook method in DockerOperator

* use AirflowProviderDeprecationWarning

airflow/providers/docker/operators/docker.py

@@ -28,6 +28,7 @@
 from tempfile import TemporaryDirectory
 from typing import TYPE_CHECKING, Iterable, Sequence
 
+from deprecated.classic import deprecated
 from docker.constants import DEFAULT_TIMEOUT_SECONDS
 from docker.errors import APIError
 from docker.types import LogConfig, Mount, Ulimit
@@ -328,6 +329,7 @@ def hook(self) -> DockerHook:
             timeout=self.timeout,
         )
 
+    @deprecated(reason="use `hook` property instead.", category=AirflowProviderDeprecationWarning)
     def get_hook(self) -> DockerHook:
         """Create and return an DockerHook (cached)."""
         return self.hook