Common Way of Referring to Tekton Resources for User Facing Messages: PipelineRun

[danielhelfand]

Part of #605

This pull request changes all user-facing messages to use PipelineRun instead of a variety of ways it is referenced throughout tkn.

This pull request only focuses on tkn pipelinerun commands, but there are other PipelineRun references throughout tkn that should be updated as well, but will be addressed in pull requests pertaining to the commands or helper packages where PipelineRun is referenced.

Additionally, this pr removes printing error messages to Stderr, and instead returns the errors to be handled by Cobra instead.

The final update introduced in this pr is an update to an error message from deleter.go, which updates the error fmt.Errorf("failed to delete %s %q: %s", d.kind, name, err) to not lowercase d.kind. As a result, this corrects the format of the error for every command in tkn.

Submitter Checklist

• Includes tests (if functionality changed/added)
• Run the code checkers with make check
• Regenerate the manpages, docs and go formatting with make generated
• Commit messages follow commit message best practices

Release Notes

Standardize the use of PipelineRun in user-facing messages for tkn pipelinerun commands

[tekton-robot]

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

File	Old Coverage	New Coverage	Delta
pkg/cmd/pipelinerun/list.go	91.2%	93.1%	1.9
pkg/cmd/pipelinerun/logs.go	85.1%	83.3%	-1.8

[danielhelfand]

/test pull-tekton-cli-integration-tests

[vdemeester]

/meow
/cc @pradeepitm12 @piyush-garg

[pradeepitm12]

/lgtm

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: pradeepitm12, vdemeester

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