Add get_data_directory function

src/frostfs_testlib/hosting/interfaces.py

@@ -112,6 +112,18 @@ class Host(ABC):
             service_name: Name of the service to restart.
         """
 
+
+    @abstractmethod
+    def get_data_directory(self, service_name: str) -> str:
+        """
+        Getting path to data directory on node for further usage
+        (example: list databases pilorama.db)
+
+        Args:
+            service_name: Name of storage node service.
+        """
+
+
     @abstractmethod
     def wait_success_suspend_process(self, process_name: str) -> None:
         """Search for a service ID by its name and stop the process