fix: enable TLS roots for flight CLI client (#6640)

Otherwise you get:

```text
Error: setup client

Caused by:
    0: connect to endpoint
    1: transport error
    2: invalid peer certificate: UnknownIssuer
    3: invalid peer certificate: UnknownIssuer
```

Also see hyperium/tonic#1904 .

arrow-flight/src/bin/flight_sql_client.rs

@@ -357,7 +357,7 @@ async fn setup_client(args: ClientArgs) -> Result<FlightSqlServiceClient<Channel
         .keep_alive_while_idle(true);
 
     if args.tls {
-        let tls_config = ClientTlsConfig::new();
+        let tls_config = ClientTlsConfig::new().with_enabled_roots();
         endpoint = endpoint
             .tls_config(tls_config)
             .context("create TLS endpoint")?;