Fix DataStore failing store pagination

DataStore persistence failure tests use FailingStore through
DynStoreWrapper. That wrapper now requires paginated store
support, so make the helper fail paginated listings the same way it
fails the other store calls.

Co-Authored-By: HAL 9000

Author: tnull

src/data_store.rs

@@ -225,6 +225,7 @@ where
 mod tests {
 	use lightning::impl_writeable_tlv_based;
 	use lightning::io;
+	use lightning::util::persist::{PageToken, PaginatedKVStore, PaginatedListResponse};
 	use lightning::util::test_utils::TestLogger;
 
 	use super::*;
@@ -315,6 +316,16 @@ mod tests {
 		}
 	}
 
+	impl PaginatedKVStore for FailingStore {
+		fn list_paginated(
+			&self, _primary_namespace: &str, _secondary_namespace: &str,
+			_page_token: Option<PageToken>,
+		) -> impl std::future::Future<Output = Result<PaginatedListResponse, io::Error>> + 'static + Send
+		{
+			async { Err(io::Error::new(io::ErrorKind::Other, "list_paginated failed")) }
+		}
+	}
+
 	fn new_failing_data_store(objects: Vec<TestObject>) -> DataStore<TestObject, Arc<TestLogger>> {
 		let store: Arc<DynStore> = Arc::new(DynStoreWrapper(FailingStore));
 		let logger = Arc::new(TestLogger::new());