Java SDK refresh method via gRPC

[sgrebnov]

1. Add client.refresh method to perform Accelerated Dataset refresh.

Example usage:

try (SpiceClient client = SpiceClient.builder()
                .build()) {

            client.refresh("taxi_trips");
            System.out.println("Dataset refresh triggered for taxi_trips");

        } catch (Exception e) {
            System.err.println("An unexpected error occurred: " + e.getMessage());
        }
    }

Refresh should work over gRPC (not HTTP) using a Flight "Action".

1. As part of this item there should be an additional configuration param introduced withHttpOnly(true/false) switching both refresh and query logic to use Http