fix(sql): handle GROUP BY ALL with aliased aggregates

[kumarUjjawal]

Which issue does this PR close?

• Closes Incorrectly parsed SQL query containing GROUP BY ALL and an alias in the projection #20909

Rationale for this change

Issue #20909 reported that:

• SELECT COUNT(*) FROM t GROUP BY ALL works
• SELECT COUNT(*) AS c FROM t GROUP BY ALL fails at execution

The failure came from an incorrect plan that grouped by an aggregate alias expression.

What changes are included in this PR?

This PR fixes GROUP BY ALL when the select list has an aliased aggregate like COUNT(*) AS c.

Changes:

• Update GROUP BY ALL expansion logic to skip any select expression that contains an aggregate, even if it is wrapped in aliases.
• Add SQL planner tests for:
  • SELECT COUNT(*) FROM ... GROUP BY ALL
  • SELECT COUNT(*) AS c FROM ... GROUP BY ALL
• Add core execution test for:
  • SELECT COUNT(*) AS c FROM ... GROUP BY ALL

Are these changes tested?

Yes

Are there any user-facing changes?