Configure GitHub workflows to use concurrency cancel-in-progress for pull requests

[apupier]

see recommended best practices at Apache
https://cwiki.apache.org/confluence/pages/viewpage.action?spaceKey=INFRA&title=GitHub+Actions+Recommended+Practices

Cancel superseded PR runs

When a new commit is pushed to a PR branch, the runs triggered by earlier commits keep going, even though their results are no longer relevant. A concurrency group scoped to the PR cancels those stale runs as soon as a newer commit arrives.

Scope the group by PR number so each PR only cancels its own runs, and limit cancel-in-progress to pull_request events so pushes to release branches are never interrupted.

concurrency:
  # One group per PR, or per ref for branch pushes.
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  # Cancel in-progress runs for PRs only, so release branch builds always complete.
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

What is the purpose of the change?

Checklist

• Make sure there is a GitHub_issue field for the change.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test to verify your logic correction. If the new feature or significant change is committed, please remember to add sample in dubbo samples project.
• Make sure gitHub actions can pass. Why the workflow is failing and how to fix it?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.80%. Comparing base (c3ceb27) to head (03d235c).

Additional details and impacted files

@@             Coverage Diff              @@
##                3.3   #16323      +/-   ##
============================================
+ Coverage     60.79%   60.80%   +0.01%     
+ Complexity    11777    11770       -7     
============================================
  Files          1953     1953              
  Lines         89208    89208              
  Branches      13458    13458              
============================================
+ Hits          54234    54243       +9     
+ Misses        29403    29396       -7     
+ Partials       5571     5569       -2     

Flag	Coverage Δ
integration-tests-java21	32.17% <ø> (+0.05%)	⬆️
integration-tests-java8	32.23% <ø> (-0.09%)	⬇️
samples-tests-java21	32.20% <ø> (+0.08%)	⬆️
samples-tests-java8	29.70% <ø> (-0.16%)	⬇️
unit-tests-java11	59.05% <ø> (+0.01%)	⬆️
unit-tests-java17	58.50% <ø> (-0.03%)	⬇️
unit-tests-java21	58.52% <ø> (+0.01%)	⬆️
unit-tests-java25	58.45% <ø> (-0.03%)	⬇️
unit-tests-java8	59.04% <ø> (-0.03%)	⬇️

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

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[zrlw]

LGTM