fix: run complex query containing system tables in local mode

[xxchan]

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What's changed and what's your intention?

fix #8791
Previously, setops like UNION, and subquery are not considered.

Checklist For Contributors

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
• I have demonstrated that backward compatibility is not broken by breaking changes and created issues to track deprecated features to be removed in the future. (Please refer to the issue)
• All checks passed in ./risedev check (or alias, ./risedev c)

Checklist For Reviewers

• I have requested macro/micro-benchmarks as this PR can affect performance substantially, and the results are shown.

Documentation

• My PR DOES NOT contain user-facing changes.

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Types of user-facing changes

Please keep the types that apply to your changes, and remove the others.

• Installation and deployment
• Connector (sources & sinks)
• SQL commands, functions, and operators
• RisingWave cluster configuration changes
• Other (please specify in the release note below)

Release note

[chenzl25]

LGTM

[xxchan]

Oops, the query for complete SHOW is still not fixed 🥵🥵🥵🥵🥵🥵🥵

because of Relation::contains_sys_table is wrong

[codecov]

Codecov Report

Merging #8797 (d1b9f09) into main (116cc11) will decrease coverage by 0.01%.
The diff coverage is 73.68%.

@@            Coverage Diff             @@
##             main    #8797      +/-   ##
==========================================
- Coverage   70.79%   70.79%   -0.01%     
==========================================
  Files        1171     1171              
  Lines      193220   193225       +5     
==========================================
+ Hits       136785   136787       +2     
- Misses      56435    56438       +3     

Flag	Coverage Δ
rust	70.79% <73.68%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/frontend/src/handler/query.rs	10.74% <50.00%> (-1.38%)	⬇️
src/frontend/src/binder/set_expr.rs	62.38% <63.63%> (+0.14%)	⬆️
src/frontend/src/binder/query.rs	97.27% <100.00%> (+0.05%)	⬆️
src/frontend/src/binder/relation/mod.rs	74.77% <100.00%> (+1.17%)	⬆️

... and 7 files with indirect coverage changes

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