Optimize Clickbench Query 29 by adding a new Optimizer rule

[devanshu0987]

Which issue does this PR close?

• Closes #.

Rationale for this change

• ClickBench Query 29 executes 90 separate SUM operations:
  • SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), ..., SUM(ResolutionWidth + 89)
• https://www.redpanda.com/blog/oxla-our-road-to-improving-oxla-results-on-clickbench#what-we-had-to-optimize
  • This blog post from Redpand mentioned an optimization they did to optimize this query.
• Transform aggregations SUM(A + k) into SUM(A) + k * COUNT(*)
• This will transform 90 SUM aggregations into 1 SUM and 1 COUNT aggregation and the results will be reused for all projections.
  • It is added before CommonSubexprEliminate to allow re use of the common SUM and COUNT expression.

What changes are included in this PR?

• New optimizer rule RewriteAggregateWithConstant

Are these changes tested?

• Unit Tests
• SLT Tests
• Explain over Query 29 shows the reuse
  • I would like the core-contributors to run the benchmark to prove the impact.

Are there any user-facing changes?

No

AI Usage

• Yes. I have heavily used assistance from various models.
• Although, I have gone through multiple rounds of clean up to reduce unintended/unnecessary changes.