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                                            yangwenbinch

bugfix:修复tcc-fence模式空回滚无限重试以及无法解决悬挂bug

Which issue(s) this PR fixes: https://github.com/apache/incubator-seata-go/issues/685

bugfix:修复tcc-fence模式空回滚无限重试以及无法解决悬挂bug

> 我觉得在QueryTCCFenceDO方法中将查不到数据时返回nil即可修复，请问这样修改是否可行？我在此pr上提交了该修改 #745 ![image](https://private-user-images.githubusercontent.com/94664304/423110540-87b14c28-1874-47d2-87d2-656521a6397f.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.4FEFBAb8GdcsXS8PPZ-vE1IzUtf9HdopFxarw7EAKsw) 功能上无影响，但如发生悬挂问题，会导致忽略报错无法插入悬挂记录，当commit请求先于prepare请求过来时，commit请求被忽略，prepare请求会插入记录，此记录只会等待最大超时时间才会被销毁。本人理解此处应确认错误后插入一条悬挂或空回滚记录，如prepare请求后至则直接放弃执行。

BUG：workflow-tcc-Do本地方法模式无法回滚

复现步骤：测试代码如下 ~~~go func init() { dtmimp.BarrierTableName = "barrier" wfName := "wf_test" err := workflow.Register2(wfName, func(wf *workflow.Workflow, data []byte) ([]byte, error) { _, err := wf.NewBranch().OnCommit(func(bb *dtmcli.BranchBarrier) error { db, err...