Remove SubQuery from logical plan and evaluation

[jpschorr]

Issue #, if available:

Description of changes:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

Conformance comparison report

	Base (de1ac1b)	947b0e9	+/-
% Passing	89.31%	89.41%	0.09%
✅ Passing	5665	5671	6
❌ Failing	678	672	-6
🔶 Ignored	0	0	0
Total Tests	6343	6343	0

Number passing in both: 5665

Number failing in both: 672

Number passing in Base (de1ac1b) but now fail: 0

Number failing in Base (de1ac1b) but now pass: 6

The following test(s) were previously failing but now pass. Before merging, confirm they are intended to pass:

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• partiql_tests::eval::query::select::select::sql_aggregate::sql_count::permissive_aggregate_with_aliasing_in_subquery_of_select_value
• partiql_tests::eval::query::select::select::select::select_distinct::strict_select_distinct_with_sub_query
• partiql_tests::eval::query::select::select::select::select_distinct::strict_select_distinct_sub_query
• partiql_tests::eval::query::select::select::sql_aggregate::sql_count::strict_aggregate_with_aliasing_in_subquery_of_select_value
• partiql_tests::eval::query::select::select::select::select_distinct::permissive_select_distinct_with_sub_query
• partiql_tests::eval::query::select::select::select::select_distinct::permissive_select_distinct_sub_query