[rc2] Fix issues with primitive collections inside JSON complex types #36723
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Looks big but product changes are quite minimal.
Continues #36296
Fixes #32493
Description
This fixes some bugs in the handling of primitive/scalar collections within complex JSON types, and adds extensive test coverage.
Customer impact
Before this PR, various queries fail which involve primitive collections (e.g. int/string array) within JSON documents. This is part of the larger complex JSON query we're delivering for 10.
How found
Testing
Regression
No
Testing
Extensive test coverage added
Risk
Low, product changes are relatively minimal and mainly add new code paths.