[DNM]: Revert "makefile: simplify code" to Test the execution time of bazel ut.

[purelind]

Reverts #50054

Test the execution time of bazel ut to confirm whether it has caused an increase in UT execution time.

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[tiprow]

Hi @purelind. Thanks for your PR.

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[ti-chi-bot]

@purelind: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/check_dev_2	fe0ca37	link	true	/test check-dev2

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[codecov]

Codecov Report

Merging #50967 (fe0ca37) into master (ba77807) will increase coverage by 0.4887%.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #50967        +/-   ##
================================================
+ Coverage   70.4512%   70.9399%   +0.4887%     
================================================
  Files          1466       1466                
  Lines        434160     434177        +17     
================================================
+ Hits         305871     308005      +2134     
+ Misses       108982     106882      -2100     
+ Partials      19307      19290        -17     

Flag	Coverage Δ
integration	43.8053% <ø> (?)

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

Components	Coverage Δ
dumpling	54.1120% <ø> (ø)
parser	∅ <ø> (∅)
br	45.6845% <ø> (-0.0032%)	⬇️