当前server实例不在哈希环上时，在分派处理中不执行遍历所有实例操作

[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]

2023-09-03 16:27:14: =========TEST START==========
2023-09-03 17:00:22: [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/pr1473410324/sta/qta-report.html and https://polaris-opentest-1306863770.cos.ap-guangzhou.myqcloud.com/pr1473410324/sta/ratelimit/qta-report.html
2023-09-03 17:00:25: [CLUSTER VERSION] PR autotest FAILED! We executed 39 test cases and 35 were passed. You can see test report in https://polaris-opentest-1306863770.cos.ap-guangzhou.myqcloud.com/pr1473410324/clu/qta-report.html
2023-09-03 17:00:29: [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/pr1473410324/k8s/qta-report.html