disttask: remove the option of running subtasks concurrently

[GMHDBJD]

What problem does this PR solve?

Issue Number: ref #41495

Problem Summary:

What is changed and how it works?

• remove the option of running subtasks concurrently

Check List

Tests

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

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

[tiprow]

Hi @GMHDBJD. Thanks for your PR.

PRs from untrusted users cannot be marked as trusted with /ok-to-test in this repo meaning untrusted PR authors can never trigger tests themselves. Collaborators can still trigger tests on the PR using /test all.

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.

[codecov]

Codecov Report

Merging #45566 (e8ffdb6) into master (b74c572) will increase coverage by 0.1691%.
Report is 15 commits behind head on master.
The diff coverage is 100.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #45566        +/-   ##
================================================
+ Coverage   73.2427%   73.4119%   +0.1691%     
================================================
  Files          1266       1274         +8     
  Lines        389633     391683      +2050     
================================================
+ Hits         285378     287542      +2164     
+ Misses        85970      85851       -119     
- Partials      18285      18290         +5     

Flag	Coverage Δ
integration	78.1388% <ø> (?)
unit	73.4037% <100.0000%> (+0.1609%)	⬆️

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

Components	Coverage Δ
dumpling	54.0444% <ø> (ø)
parser	85.0417% <ø> (-0.0247%)	⬇️
br	52.1575% <ø> (+0.0250%)	⬆️

[hawkingrei]

/ok-to-test

[zimulala]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tangenta, zimulala

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [tangenta,zimulala]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-07-26 05:43:07.491914997 +0000 UTC m=+333130.086445980: ☑️ agreed by tangenta.
• 2023-07-26 07:48:28.508889949 +0000 UTC m=+340651.103420939: ☑️ agreed by zimulala.

[GMHDBJD]

/merge

[ti-chi-bot]

@GMHDBJD: We have migrated to builtin LGTM and approve plugins for reviewing.

Please use /approve when you want approve this pull request.

The changes announcement: LGTM plugin changes

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 ti-community-infra/tichi repository.

[hawkingrei]

/retest

[GMHDBJD]

/retest

[hawkingrei]

/retest

[hawkingrei]

/test all

[hawkingrei]

/retest

[hawkingrei]

/retest