WIP: directly pass Vec<Expr> instead of &[Expr] to avoid clone

[Lordworms]

Which issue does this PR close?

change performance of eliminate_subexpr. Still in progress, this is just for benchmark test

part of #9873

Rationale for this change

What changes are included in this PR?

Are these changes tested?

Are there any user-facing changes?

[Lordworms]

after first draft

[github-actions[bot]]

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