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• granular_subquery_pushdown
• colocation_features
• create_distributed_partitions
• enable-coverage-testing
• master
• subquery_view
• update_subquery_on_where_false

Add infrastructure for filtering restriction contexts based on the input query

In subquery pushdown, we first ensure that each relation is joined with at least
on another relation on the partition keys. That's fine given that the decision
is binary: pushdown the query at all or not.

With recursive planning, we'd want to check whether any specific part
of the query can be pushded down or not. Thus, we need the ability to
understand which part(s) of the subquery is safe to pushdown. This commit
adds the infrastructure for doing that.