Add support for displayName from childReferences

[AlanGreene]

Changes

https://github.com/tektoncd/dashboard/issues/2410 Depends on https://github.com/tektoncd/pipeline/pull/7683

Update utils to support pulling the pipeline task displayName from the run's status.childReferences. This adds support for dynamic matrix display names, and provides a consistent location to retrieve the resolve display name value after param substitution etc. has taken place.

Submitter Checklist

As the author of this PR, please check off the items in this checklist:

• [ ] Docs included if any changes are user facing
• [x] Tests included if any functionality added or changed
• [x] Follows the commit message standard
• [x] Meets the Tekton contributor standards (including functionality, content, code)
• [x] Has a kind label. You can add one by adding a comment on this PR that contains /kind <type>. Valid types are bug, cleanup, design, documentation, feature, flake, misc, question, tep
• [x] Release notes block below has been updated with any user facing changes (new features, significant UI changes, API changes, bug fixes, changes requiring upgrade notices or deprecation warnings)
• [ ] Release notes contains the string "action required" if the change requires additional action from users switching to the new release

Release Notes

Add support for matrix task display names. When a `displayName` is set on a matrix task, the Dashboard will now retrieve that value from the PipelineRun status if present and display it in the task tree instead of the pipeline task name which would be the same for all instances of that matrix task. This makes it easier for users to differentiate between instances of the task without having to inspect the params or logs.

This feature requires Pipelines v0.58.0 or newer.

[tekton-robot]

Skipping CI for Draft Pull Request. If you want CI signal for your change, please convert it to an actual PR. You can still manually trigger a test run with /test all

[AlanGreene]

Tentatively targetting Dashboard v0.45 if https://github.com/tektoncd/pipeline/pull/7683 is included in Pipelines v0.58 next week and we have time to fully test it.

[AlanGreene]

/kind feature

[AlanGreene]

Tested with Pipelines nightly release v20240319-81ea62d876

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[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: briangleeson

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