Use issue tracker data tables for reading & storing data
What does this MR do?
It starts using data_fields (jira_tracker_data for Jira and issue_tracker_data for other issue trackers).
- it reads data from both properties and data fields
- it creates new data and updates data only in data_fields tables
Links
- CE MR: gitlab-foss!29868 (closed)
- Legacy issue: gitlab-foss#63082 (moved)
- Issue: #29402 (closed)
Edited by Jarka Košanová