feat(br): enable condition trigger of br test on 8.1

[purelind]

Enable condition trigger for br integration test pipepline on lts branch release-8.1，PRs that modify relevant files need to pass this test before they can be merged.

[ti-chi-bot]

I have already done a preliminary review for you, and I hope to help you do a better job.

Based on the pull request title and description, the key changes are that this pull request enables a condition trigger for br integration test pipeline on the lts branch release-8.1. This means that pull requests that modify relevant files will need to pass this test before they can be merged.

The changes in the diff appear to modify the release-8.1-presubmits.yaml file, adding a run_if_changed field that specifies the files which will trigger the pipeline and removing the always_run, optional, and skip_report fields.

One potential problem is that the run_if_changed field may not capture all the relevant files that need to trigger the pipeline. It would be useful to test this by making a small change to a file that should trigger the pipeline and ensuring that the pipeline is indeed triggered.

Another potential problem is that the decorate field has been set to false, which could impact the functionality of the pipeline. It would be useful to confirm that this was a deliberate decision and won't cause any issues.

Fixing suggestions:

• Confirm that the run_if_changed field captures all relevant files that should trigger the pipeline.
• Confirm that setting decorate to false is a deliberate decision and won't cause any issues. If it will cause issues, suggest setting it to true.
• Consider adding more detailed documentation to the pull request description to explain the reasoning behind these changes and how they will impact the pipeline.

[purelind]

/cc @BornChanger

[purelind]

/hold
It needs to take effect when resources are relatively available.

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-01-24 10:51:57.131238808 +0000 UTC m=+437244.462158225: ☑️ agreed by wuhuizuo.

[ti-chi-bot]

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: BornChanger, wuhuizuo

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[purelind]

/unhold