添加flink连接同步timeout

[zyczw]

mysql -> doris 由于目标端doris在夜晚load 比较高，导致doris connnector 执行streamload 超时导致丢失数据。 期望在doris sink 端配置超时时间，或者，添加执行streamload 失败重试机制

[zyczw]

通过配置这个timeout参数，设置flink写入sink端的超时时间

[baisui1981]

ChunjunDorisSinkFactory 中添加以下三个参数，用户可以自行定义连接超时异常处理参数

    @FormField(ordinal = 13, advance = true, type = FormFieldType.INT_NUMBER, validate = {Validator.require})
    public Integer connectTimeout;// = loadConf.getRequestConnectTimeoutMs() == null ? DORIS_REQUEST_CONNECT_TIMEOUT_MS_DEFAULT : loadConf.getRequestConnectTimeoutMs();
    @FormField(ordinal = 14, advance = true, type = FormFieldType.INT_NUMBER, validate = {Validator.require})
    public Integer socketTimeout;// = loadConf.getRequestReadTimeoutMs() == null ? DORIS_REQUEST_READ_TIMEOUT_MS_DEFAULT : loadConf.getRequestReadTimeoutMs();
    @FormField(ordinal = 15, advance = true, type = FormFieldType.INT_NUMBER, validate = {Validator.require})
    public Integer retries;// = loadConf.getRequestRetries() == null ? DORIS_REQUEST_RETRIES_DEFAULT : loadConf.getRequestRetries();