*: move util into pkg/util

[hawkingrei]

What problem does this PR solve?

Issue Number: ref #41241

Problem Summary:

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov]

Codecov Report

Merging #47151 (a4c2fc3) into master (71e5858) will increase coverage by 0.0086%.
Report is 3 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #47151        +/-   ##
================================================
+ Coverage   73.0051%   73.0138%   +0.0086%     
================================================
  Files          1338       1341         +3     
  Lines        399462     400139       +677     
================================================
+ Hits         291628     292157       +529     
- Misses        88992      89105       +113     
- Partials      18842      18877        +35     

Flag	Coverage Δ
integration	78.1388% <ø> (?)

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

Components	Coverage Δ
dumpling	53.9913% <ø> (ø)
parser	84.9620% <ø> (ø)
br	53.1008% <ø> (ø)

[tiprow]

@hawkingrei: 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
tiprow_fast_test	a4c2fc3	link	true	/test tiprow_fast_test

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[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/build	a4c2fc3	link	true	/test build
idc-jenkins-ci-tidb/check_dev	a4c2fc3	link	true	/test check-dev
idc-jenkins-ci-tidb/unit-test	a4c2fc3	link	true	/test unit-test

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.