[wip] dm: install python dependency for integration test

[River2000i]

What problem does this PR solve?

Issue Number: close #11752

What is changed and how it works?

Check List

Tests

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

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

Please refer to [Release Notes Language Style Guide](https://pingcap.github.io/tidb-dev-guide/contribute-to-tidb/release-notes-style-guide.html) to write a quality release note.

If you don't think this PR needs a release note then fill it with `None`.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[ti-chi-bot]

Hi @River2000i. Thanks for your PR.

I'm waiting for a pingcap member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

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.

[purelind]

/ok-to-test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.1386%. Comparing base (b2a4f9a) to head (204b8c1).
Report is 1 commits behind head on master.

Additional details and impacted files

Components	Coverage Δ
cdc	59.5637% <ø> (-0.0119%)	⬇️
dm	50.0269% <ø> (-0.0097%)	⬇️
engine	53.2167% <ø> (-0.0226%)	⬇️

Flag	Coverage Δ
unit	55.1386% <ø> (-0.0124%)	⬇️

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

@@               Coverage Diff                @@
##             master     #11751        +/-   ##
================================================
- Coverage   55.1510%   55.1386%   -0.0124%     
================================================
  Files          1002       1002                
  Lines        137399     137399                
================================================
- Hits          75777      75760        -17     
- Misses        56074      56091        +17     
  Partials       5548       5548                

[River2000i]

/retest
not relate fail

"Message": "startLocation: [position: (dm-it-d057503c-049a-4b78-8f1f-52dd03595422-b19zl-29htb-bin.000001, 42228), gtid-set: 013005f3-a328-11ef-a043-827aabe578a7:1-194], endLocation: [position: (dm-it-d057503c-049a-4b78-8f1f-52dd03595422-b19zl-29htb-bin.000001, 42353), gtid-set: 013005f3-a328-11ef-a043-827aabe578a7:1-195], origin SQL: [alter table shardddl1.tb1 add column b int after a]: fail to do etcd txn operation: txn commit failed",

[River2000i]

/retest
not relate fail

• mkdir /home/jenkins/agent/workspace/pingcap/tiflow/pull_dm_integration_test/mysql-ssl
• cp -r /var/lib/mysql/.pem /home/jenkins/agent/workspace/pingcap/tiflow/pull_dm_integration_test/mysql-ssl/
  cp: cannot stat '/var/lib/mysql/.pem': No such file or directory
  script returned exit code 1

[ti-chi-bot]

@River2000i: 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
pull-dm-integration-test	204b8c1	link	true	/test dm-integration-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.