disttask/ddl: add retry for sessionExpired

[ywqzzy]

What problem does this PR solve?

Issue Number: close #48546

Problem Summary:
When trying to acquire dist lock on etcd, we might encounter sessionExpired error.

What is changed and how it works?

1. Add retry backoffer to acquire lock.

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]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[tiprow]

Hi @ywqzzy. Thanks for your PR.

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov]

Codecov Report

Merging #48545 (eb69138) into master (1bb8b6f) will increase coverage by 1.2702%.
Report is 42 commits behind head on master.
The diff coverage is 4.0000%.

❗ Current head eb69138 differs from pull request most recent head d628cb3. Consider uploading reports for the commit d628cb3 to get more accurate results

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #48545        +/-   ##
================================================
+ Coverage   71.4240%   72.6942%   +1.2702%     
================================================
  Files          1404       1382        -22     
  Lines        407213     410167      +2954     
================================================
+ Hits         290848     298168      +7320     
+ Misses        96412      93119      -3293     
+ Partials      19953      18880      -1073     

Flag	Coverage Δ
integration	43.0561% <0.0000%> (?)

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

Components	Coverage Δ
dumpling	53.9874% <ø> (ø)
parser	∅ <ø> (∅)
br	48.7955% <ø> (-4.2900%)	⬇️

[tangenta]

We can remove the Register() code here. Later I will file a PR to implement "only one task can run at the same time".

[tangenta]

#48645

[ti-chi-bot]

PR needs rebase.

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[ti-chi-bot]

@ywqzzy: 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	d628cb3	link	true	/test mysql-test
idc-jenkins-ci-tidb/build	d628cb3	link	true	/test build
idc-jenkins-ci-tidb/check_dev_2	d628cb3	link	true	/test check-dev2
idc-jenkins-ci-tidb/unit-test	d628cb3	link	true	/test unit-test
idc-jenkins-ci-tidb/check_dev	d628cb3	link	true	/test check-dev

Full PR test history. Your PR dashboard.

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