当一致性哈希环上不存在当前server节点时，跳过遍历实例逻辑

[qnnn]

Please provide issue(s) of this PR:
Fixes #1203

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Please check any characteristics that apply to this pull request.

• Does not have any user-facing changes. This may include API changes, behavior changes, performance improvements, etc.

[polaris-test-bot]

2023-09-07 16:00:54: =========TEST START==========
2023-09-07 16:45:29: [STANDALONE VERSION]PR autotest FAILED! We executed 47 test cases and 43 were passed. You can see test report in https://polaris-opentest-1306863770.cos.ap-guangzhou.myqcloud.com/pr1505795712/sta/qta-report.html and https://polaris-opentest-1306863770.cos.ap-guangzhou.myqcloud.com/pr1505795712/sta/ratelimit/qta-report.html
2023-09-07 16:45:33: [CLUSTER VERSION] PR autotest FAILED! We executed 39 test cases and 37 were passed. You can see test report in https://polaris-opentest-1306863770.cos.ap-guangzhou.myqcloud.com/pr1505795712/clu/qta-report.html
2023-09-07 16:45:37: [KUBENETES VERSION]PR autotest FAILED! We executed 39 test cases and 36 were passed. You can see test report in https://polaris-opentest-1306863770.cos.ap-guangzhou.myqcloud.com/pr1505795712/k8s/qta-report.html