Storage: Return an iterator from backend List (#91185)

pkg/storage/unified/sql/testdata/resource_history_list_mysql_sqlite.sql

@@ -1,4 +1,4 @@
-SELECT kv."resource_version", kv."value"
+SELECT kv."resource_version", kv."namespace", kv."name", kv."value"
 FROM "resource_history" as kv
 INNER JOIN (
 	SELECT "namespace", "group", "resource", "name", max("resource_version") AS "resource_version"

pkg/storage/unified/sql/testdata/resource_list_mysql_sqlite.sql

@@ -1,6 +1,5 @@
-SELECT "resource_version", "value"
+SELECT "resource_version", "namespace", "name", "value"
     FROM "resource"
     WHERE 1 = 1 AND "namespace" = ?
     ORDER BY "resource_version" DESC
-    LIMIT ?
 ;