fix(e2e): put back the version of backend cardano-db used to avoid default mecanism

Author: turmelclem

mithril-test-lab/mithril-end-to-end/src/mithril/client.rs

@@ -220,9 +220,12 @@ impl ClientCommand {
             ClientCommand::CardanoStakeDistribution(cmd) => {
                 [vec!["cardano-stake-distribution".to_string()], cmd.cli_arg()].concat()
             }
-            ClientCommand::CardanoDbV2(cmd) => {
-                [vec!["cardano-db".to_string()], cmd.cli_arg()].concat()
-            }
+            ClientCommand::CardanoDbV2(cmd) => [
+                vec!["cardano-db".to_string()],
+                cmd.cli_arg(),
+                vec!["--backend".to_string(), "v2".to_string()],
+            ]
+            .concat(),
         };
         args.push("--json".to_string());