[release v0.41.x] Fix v1beta1 pipelineref bundle conversion to resolver

[JeromeJu]

Changes

This is a cherry-pick of #6791

This commit fixes the bundle conversion for PipelineRef which should be converting to the bundle Resolver with a Pipeline kind. It also adds the conversion integration tests for the bundle logics to prevent such error. It extracts the setup for bundle and makes it into a helper function.

/kind bug

Submitter Checklist

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

• [n/a] 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
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Release Notes

bug fix: bundle resolver type param value for pipelineRef conversion

[tekton-robot]

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

File	Old Coverage	New Coverage	Delta
pkg/apis/pipeline/v1beta1/pipelinerun_conversion.go	96.8%	95.5%	-1.3

[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/v1beta1/pipelinerun_conversion.go	96.8%	95.5%	-1.3

[JeromeJu]

The conversion e2e test has not yet been introduced in v0.41.x but the conversion for v1beta1 has.
This commit ignores the changes to the conversion e2e test.

[tekton-robot]

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

File	Old Coverage	New Coverage	Delta
pkg/apis/pipeline/v1beta1/pipelinerun_conversion.go	96.8%	95.5%	-1.3

[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/v1beta1/pipelinerun_conversion.go	96.8%	95.5%	-1.3

[tekton-robot]

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

File	Old Coverage	New Coverage	Delta
pkg/apis/pipeline/v1beta1/pipelinerun_conversion.go	96.8%	95.5%	-1.3

[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/v1beta1/pipelinerun_conversion.go	96.8%	95.5%	-1.3

[vdemeester]

/retest
/approve
/lgtm

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[vdemeester]

/retest

[afrittoli]

The "wip" commit was probably just a missed squash - for anyone wondering about that commit.