fix: return err after roll back

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 22.94%. Comparing base (b099995) to head (a52d2ad). Report is 2 commits behind head on main.

Files	Patch %	Lines
pkg/aliyun/client/ecs.go	0.00%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #641 +/- ## ========================================== - Coverage 23.08% 22.94% -0.14% ========================================== Files 62 62 Lines 6493 6554 +61 ========================================== + Hits 1499 1504 +5 - Misses 4757 4809 +52 - Partials 237 241 +4 ``` | [Flag](https://app.codecov.io/gh/AliyunContainerService/terway/pull/641/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AliyunContainerService) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/AliyunContainerService/terway/pull/641/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AliyunContainerService) | `22.94% <0.00%> (-0.14%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AliyunContainerService#carryforward-flags-in-the-pull-request-comment) to find out more.

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