fix(binder): bind CTE only when schema_name is empty

[TennyZhuang]

Signed-off-by: TennyZhuang [email protected]

What's changed and what's your intention?

PLEASE DO NOT LEAVE THIS EMPTY !!!

See the related issue

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in ./risedev check (or alias, ./risedev c)

Refer to a related PR or issue link (optional)

Fixes #3155

[codecov]

Codecov Report

Merging #3173 (30f53e1) into main (14f995c) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #3173      +/-   ##
==========================================
- Coverage   73.54%   73.54%   -0.01%     
==========================================
  Files         739      739              
  Lines      101809   101811       +2     
==========================================
  Hits        74880    74880              
- Misses      26929    26931       +2     

Flag	Coverage Δ
rust	73.54% <100.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
src/frontend/src/binder/relation/mod.rs	86.80% <100.00%> (+0.18%)	⬆️
src/meta/src/hummock/mock_hummock_meta_client.rs	42.39% <0.00%> (-1.09%)	⬇️
src/storage/src/hummock/local_version_manager.rs	84.12% <0.00%> (-0.16%)	⬇️

📣 Codecov can now indicate which changes are the most critical in Pull Requests. Learn more