Fix auto create tennat concurrently will cause the task failed #15909
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Purpose of the pull request
When there exist multiple tasks using the same tenant are going to the same worker concurrently, if the tenant doesn't exist, and
autoCreateTenantEnabledis true, then each task will try to create task, but only the first task will success, others will failed, due to the tenant is already exist.Brief change log
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This pull request is code cleanup without any test coverage.
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