perf: Improve unique pred-pd

[ritchie46]

No description provided.

[github-actions]

The uncompressed lib size after this PR is 1117.0735 MB.

[codecov]

Codecov Report

Attention: Patch coverage is 88.46154% with 6 lines in your changes missing coverage. Please review.

Project coverage is 78.98%. Comparing base (e360e0a) to head (3b7b57a).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
...an/src/plans/optimizer/predicate_pushdown/utils.rs	73.91%	6 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #20569   +/-   ##
=======================================
  Coverage   78.98%   78.98%           
=======================================
  Files        1564     1564           
  Lines      220759   220765    +6     
  Branches     2504     2504           
=======================================
+ Hits       174363   174368    +5     
- Misses      45822    45823    +1     
  Partials      574      574           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.