[test] apply the new test style to common-mem-allocator

[PsiACE]

Signed-off-by: Chojan Shang [email protected]

I hereby agree to the terms of the CLA available at: https://databend.rs/policies/cla/

Summary

[test] apply the new test style to common-mem-allocator

Changelog

• Improvement
• Not for changelog (changelog entry is not required)

Related Issues

Related #1866

Test Plan

Unit Tests

Stateless Tests

[databend-bot]

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[codecov-commenter]

Codecov Report

Merging #2805 (c9c5781) into main (12e4bb0) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##            main   #2805   +/-   ##
=====================================
  Coverage     69%     69%           
=====================================
  Files        600     600           
  Lines      32294   32294           
=====================================
  Hits       22387   22387           
  Misses      9907    9907           

Impacted Files	Coverage Δ
common/mem-allocator/src/malloc_size.rs	73% <ø> (ø)
metasrv/src/meta_service/meta_service_impl.rs	76% <0%> (-1%)	⬇️
common/planners/src/plan_expression_visitor.rs	100% <0%> (+2%)	⬆️

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[BohuTANG]

/lgtm