Upgrade from 8.x to 9.1 triggers full reindex twice

Issue Summary

This is reproducible on Data Center: yes

Steps to Reproduce

1. Setup Jira 8.x
2. Upgrade to version 9.1.0 or higher

Expected Results

Full re-index is triggered once after upgrade task UpgradeTask_Build900000 has finished.

Actual Results

Full re-index is triggered twice: once before upgrade task as part of every node index startup flow and once after upgrade task is completed.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available