Revert "testkit,store/mockstore: make store image to accelerate unit test"

[hawkingrei]

Reverts #42521

[ti-chi-bot]

Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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[ti-chi-bot]

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov]

Codecov Report

Merging #50189 (d2aba07) into master (5cc32b6) will decrease coverage by 11.9394%.
Report is 1 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #50189         +/-   ##
=================================================
- Coverage   79.3020%   67.3626%   -11.9395%     
=================================================
  Files          2447       2558        +111     
  Lines        673965     840065     +166100     
=================================================
+ Hits         534468     565890      +31422     
- Misses       118116     250376     +132260     
- Partials      21381      23799       +2418     

Flag	Coverage Δ
integration	36.7214% <ø> (?)

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

Components	Coverage Δ
dumpling	73.6130% <ø> (ø)
parser	∅ <ø> (∅)
br	71.7468% <ø> (+3.4102%)	⬆️

[ti-chi-bot]

@hawkingrei: The following tests 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/mysql-test	d2aba07	link	true	/test mysql-test
idc-jenkins-ci-tidb/unit-test	d2aba07	link	true	/test unit-test

Full PR test history. Your PR dashboard.

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