Separate java and cpp/py UT

[HTHou]

After this PR, if only change some cpp code, we don't need to run the Java UT, which will accelerate the CI running.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.73%. Comparing base (d30d283) to head (4e62bd9).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #305   +/-   ##
========================================
  Coverage    63.73%   63.73%           
========================================
  Files          504      504           
  Lines        32048    32048           
  Branches      4128     4128           
========================================
  Hits         20425    20425           
  Misses       11146    11146           
  Partials       477      477           

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