Support table functions with non-literal arguments in subqueries and lateral joins

[nicktobey]

This PR fixes several issues that prevent table functions from evaluating correctly when they take non-literal arguments and appear in subqueries or lateral joins.

• 8a5f582 fixes a problem where references to an outer scope that appear in the topmost scope of a subquery won't cause the subquery to be marked as containing out-of-scope references.
  • This caused the subquery to be seen as cacheable even though it isn't, which could cause incorrect query results
  • This also caused the analyzer to incorrectly generate a CrossJoin instead of a LateralCrossJoin, which would then cause the join planner to commute the join children even though it was not safe to do so. This would ultimately cause an out-of-bounds field access while building the table function.
• 0147ad3 fixes two other issues where join planning would drop the Lateral marker during join planning, resulting in generating a CrossJoin instead of a LateralCrossJoin
• 0e2b6da fixes an oversight in the LateralCrossJoin RowIter that was causing rows from the parent and left scopes to not be passed into the right child

All three of these changes are required together in order to properly evaluate the newly added test queries.

[fulghum]

Looks good!