refactor: remove some workarounds about Java frontend

[xxchan]

What's changed and what's your intention?

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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)

[codecov]

Codecov Report

Merging #3223 (3c7c7de) into main (a4aab7a) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #3223   +/-   ##
=======================================
  Coverage   73.48%   73.48%           
=======================================
  Files         746      746           
  Lines      101957   101957           
=======================================
+ Hits        74923    74924    +1     
+ Misses      27034    27033    -1     

Flag	Coverage Δ
rust	73.48% <100.00%> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
src/utils/pgwire/src/pg_field_descriptor.rs	76.92% <ø> (ø)
src/utils/pgwire/src/pg_response.rs	73.68% <ø> (ø)
src/common/src/array/column_proto_readers.rs	77.96% <100.00%> (ø)
src/common/src/types/chrono_wrapper.rs	83.07% <100.00%> (ø)
src/frontend/src/stream_fragmenter/mod.rs	91.11% <100.00%> (ø)
src/meta/src/barrier/mod.rs	69.13% <0.00%> (-0.33%)	⬇️
src/storage/src/hummock/local_version_manager.rs	84.01% <0.00%> (+0.15%)	⬆️
src/meta/src/hummock/mock_hummock_meta_client.rs	43.95% <0.00%> (+1.09%)	⬆️

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[liurenjie1024]

LGTM