Refactor Ci::Partition metadata access
Ref: #454978 (closed)
What does this MR do and why?
Following up !150443 (merged)
This MR refactors how we access partitions metadata for CI models.
It improves the performance of those two methods by making only 1 query instead of one for each table.
above_threshold?
all_partitions_exist?
SQL After
Edited by Max Orefice