ci(require-label): add new reusable workflow

[xmfcx]

Description

🤔 We have make-sure-label-is-present.yaml but it skips when it cannot find the label and let's the remaining actions decide what to do with the result. Because it doesn't fail, it skips the remaining workflows.

🫤 We also have prevent-no-label-execution.yaml which has the identical behavior. But this one is only here for legacy reasons, it can get confused when multiple labels are added at the same time.

So we needed a workflow that actually fails when the input label is not present.

require-label workflow does just that. It's a slightly modified version of make-sure-label-is-present.yaml but with additional summary and useful debug output.

Tests performed

Failure

• https://github.com/autowarefoundation/autoware.universe/actions/runs/12470261679

Success

• https://github.com/autowarefoundation/autoware.universe/actions/runs/12469760090

Effects on system behavior

Not applicable.

Interface changes

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In-review checklist for the PR reviewers

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Post-review checklist for the PR author

The PR author must check the checkboxes below before merging.

• There are no open discussions or they are tracked via tickets.

After all checkboxes are checked, anyone who has write access can merge the PR.

[sasakisasaki]

Quick Comment

Looks good!

Reason for Approval

The workflow has two main features: success and failure cases. The PR description shows that the both features are tested well.

[xmfcx]

Applied ubuntu-latest and tested on the last job: