test: Add TVF invocation tests with nested table function calls

[mohsaka]

Description

Add additional tests to TestTableFunctionInvocation to test and show examples of nested table function calls.

Motivation and Context

We didn't have any tests for these types of table function calls.

Impact

Test Plan

Ran new tests.

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Release Notes

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== NO RELEASE NOTE ==

[sourcery-ai]

Reviewer's Guide

Adds new tests to TestTableFunctionInvocation to cover nested table function invocations using CTEs and subqueries, including multi-level nesting and combinations with pass-through functions.

File-Level Changes

Change	Details	Files
Add CTE-based tests for nested table function invocations.	Introduce testNestedTableFunctionsWithCTE test method. Add coverage for single-level nesting of system.identity_function over a CTE-produced TABLE. Add coverage for multi-level nesting using system.repeat and system.identity_function chained through CTEs.	presto-tests/src/main/java/com/facebook/presto/tests/TestTableFunctionInvocation.java
Add subquery-based tests for nested table function invocations, including pass-through behavior.	Introduce testNestedTableFunctionsWithSubquery test method. Add coverage for nested system.identity_function and system.repeat calls expressed via inline subqueries. Add coverage for combining nested table functions with system.identity_pass_through_function.	presto-tests/src/main/java/com/facebook/presto/tests/TestTableFunctionInvocation.java

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[sourcery-ai]

Hey - I've left some high level feedback:

• The code comments that label the CTE approach as the "recommended" way to chain table functions introduce guidance into tests; consider either removing that normative wording or referencing a concrete spec/behavior being validated instead, so tests stay focused on behavior rather than recommendations.
• The nested table function queries in the subquery test method are quite dense; consider extracting repeated patterns (e.g., the VALUES (1, 'x') repeat chains) into small helper builders or at least adding brief inline comments explaining each nesting level to make future maintenance easier.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The code comments that label the CTE approach as the "recommended" way to chain table functions introduce guidance into tests; consider either removing that normative wording or referencing a concrete spec/behavior being validated instead, so tests stay focused on behavior rather than recommendations.
- The nested table function queries in the subquery test method are quite dense; consider extracting repeated patterns (e.g., the `VALUES (1, 'x')` repeat chains) into small helper builders or at least adding brief inline comments explaining each nesting level to make future maintenance easier.

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[aditi-pandit]

Thanks @mohsaka