fix: Fix distributed query manager bug

[liurenjie1024]

What's changed and what's your intention?

Fix a bug which may lead to schedule failure.

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests

Refer to a related PR or issue link (optional)

Closes #1723

[codecov]

Codecov Report

Merging #1778 (646de15) into main (d0a2928) will decrease coverage by 0.02%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1778      +/-   ##
==========================================
- Coverage   71.29%   71.27%   -0.03%     
==========================================
  Files         605      605              
  Lines       78599    78628      +29     
==========================================
- Hits        56041    56040       -1     
- Misses      22558    22588      +30     

Flag	Coverage Δ
rust	71.27% <0.00%> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
src/frontend/src/scheduler/execution/query.rs	0.00% <0.00%> (ø)
src/frontend/src/scheduler/execution/stage.rs	0.00% <0.00%> (ø)
src/connector/src/filesystem/file_common.rs	80.44% <0.00%> (-0.45%)	⬇️
src/common/src/alloc.rs	100.00% <0.00%> (ø)
src/utils/pgwire/src/error.rs	0.00% <0.00%> (ø)
src/common/src/buffer/bitmap.rs	87.64% <0.00%> (ø)
src/frontend/src/handler/set.rs	0.00% <0.00%> (ø)
src/frontend/src/meta_client.rs	0.00% <0.00%> (ø)
src/common/src/buffer/buffer_.rs	78.43% <0.00%> (ø)
src/source/src/connector_source.rs	0.00% <0.00%> (ø)
... and 11 more

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