Nr. 2 - [TEP-0056]: Update state methods to check for child PipelineRuns.

[twoGiants]

Important

Pull request number 2.
The numbering Nr. 2 - [TEP-0056] means the PRs must be merged in order. They build on each other.

Changes

[TEP-0056]: Second PR of Pipelines-in-Pipelines feature implementation.

Extend existing methods in pipelinerunstate.go to check for child PipelirRuns and add new test cases.

Issue #8760, #7166.

Release notes will be added with the last PR which will make this feature functional for users.

/kind feature

Submitter Checklist

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

• Has Docs if any changes are user facing, including updates to minimum requirements e.g. Kubernetes version bumps
• Has Tests included if any functionality added or changed
• pre-commit Passed
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Release Notes

NONE

[tekton-robot]

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[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage-df to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/apis/pipeline/v1/pipelinerun_types.go	92.5%	92.6%	0.1
pkg/reconciler/pipelinerun/pipelinerun.go	91.6%	91.5%	-0.1
pkg/reconciler/pipelinerun/resources/pipelinerunresolution.go	96.5%	96.0%	-0.5
pkg/reconciler/pipelinerun/resources/pipelinerunstate.go	98.2%	97.9%	-0.2

[waveywaves]

/kind feature