Added unit to logs getter

Signed-off-by: Dmitry Anurin <d.anurin@yadro.com>

src/frostfs_testlib/hosting/docker_host.py

@@ -211,6 +211,7 @@ class DockerHost(Host):
         message_regex: str,
         since: Optional[datetime] = None,
         until: Optional[datetime] = None,
+        unit: Optional[str] = None,
     ) -> bool:
         client = self._get_docker_client()
         for service_config in self._config.services:

src/frostfs_testlib/hosting/interfaces.py

@@ -254,6 +254,7 @@ class Host(ABC):
         message_regex: str,
         since: Optional[datetime] = None,
         until: Optional[datetime] = None,
+        unit: Optional[str] = None,
     ) -> bool:
         """Checks logs on host for specified message regex.