feat(proxy): support ProxyPluginResponse redirect

[segment11]

So I can create a plugin handle MOVED when using custom sharding.

eg. ` public ProxyPluginResponse executeReply(ProxyReply reply) { var redisReply = reply.getReply(); var command = reply.getCommand(); var context = command.getCommandContext();

    var bid = context.getBid();
    var bgroup = context.getBgroup();
    if (redisReply instanceof ErrorReply) {
        var error = ((ErrorReply) redisReply).getError();
        if (error != null && error.startsWith("MOVED")) {
            var alreadyContainsMoved = bgroup.contains(MOVED_IN_BGROUP);
            if (!alreadyContainsMoved) {
                var arr = error.split(" ");
                var slot = Integer.parseInt(arr[1]);
                var hostWithPort = arr[2];

                updateOneSlotTargetHostIpWhenGetMoveErrorReply(bid, bgroup, slot, hostWithPort);
                logger.info("Update moved slot {} to {} for bid: {}.", slot, hostWithPort, bid);

                var bgroupAddMoved = MontCacheProxyRouteConfUpdater.MOVED_IN_BGROUP + bgroup;
                var routeRewriteResult = new RouteRewriteResult(bid, bgroupAddMoved);
                var response = new ProxyPluginResponse(false, true, routeRewriteResult);
                return response;
            }
        }
    }

    return ProxyPluginResponse.SUCCESS;
}

`