feat: Eliminate Duplicated Expr Rule

[Sweetsuro]

Major Changes

Add an eliminate duplicate expression rule which:

1. Removes duplicate sort expressions
2. Removes duplicate aggregate group bys

Also, this PR adds derive traits for Hash, PartialEq, and Eq for RelNode.

Examples:
select * from t1 order by id, name, id desc, id asc, name desc becomes
select * from t1 order by id, name

select * from t1 group by id, name, id becomes
select * from t1 group by id, name

Rule Type

Heuristics (always apply), Transformation Rule (logical to logical)

[skyzh]

Rest LGTM

[skyzh]

and adding a second rule that applies on the same expression might cause panic, at that time you should move the rule into the heuristics phase (need to create the heuristic optimizer in df-optimizer)

[skyzh]

feel free to merge if you feel it's ready :)