Add metabase and write_cache operations

Signed-off-by: Andrey Berezin <a.berezin@yadro.com>

src/frostfs_testlib/hosting/interfaces.py

@@ -131,6 +131,26 @@ class Host(ABC):
 
         """
 
+    @abstractmethod
+    def delete_metabase(self, service_name: str) -> None:
+        """
+        Deletes all metabase*.db in the node.
+
+        Args:
+            service_name: Name of storage node service.
+
+        """
+
+    @abstractmethod
+    def delete_write_cache(self, service_name: str) -> None:
+        """
+        Deletes all write_cache in the node.
+
+        Args:
+            service_name: Name of storage node service.
+
+        """
+
     @abstractmethod
     def delete_blobovnicza(self, service_name: str) -> None:
         """