Sharding Key Investigation for work_item_hierarchy_restrictions table
What does this MR do and why?
This MR contains the changes in !200898 (merged), with the removal of the caching which resulted in a revert of these changes here
"Replace usage of the HierarchyRestriction active record model and db table with system defined, static data. This is a precursor to dropping the table entirely."
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Related to #553477 (closed)
Edited by Matt D'Angelo