Copy Over PipelineRun and TaskRun Spec for --last and use run Options

[danielhelfand]

Closes #1133

Changes

In order to avoid the issue of needing to add properties for --last and --use-taskrun/--use-pipelinerun options, the entire Spec of the previous TaskRun or PipelineRun should be copied over to the new run object. This will prevent future issues like #1133 and #862.

This may also address #1119, but will not close the issue until there is further verification.

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

Fix --last and --use-taskrun/--use-pipelinerun commands so that all properties are used as part of new run

[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/clustertask/start.go	80.3%	80.0%	-0.3
pkg/cmd/pipeline/start.go	67.6%	67.2%	-0.4
pkg/cmd/task/start.go	82.2%	81.9%	-0.3

[danielhelfand]

/retest

[danielhelfand]

Failures seem related to set up of environment:

2020/08/19 15:55:24 main.go:319: Something went wrong: failed to prepare test environment: 
--provider=gke boskos failed to acquire project: resources not found

[danielhelfand]

/retest

[danielhelfand]

/test pull-tekton-cli-go-coverage

[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/clustertask/start.go	80.3%	80.0%	-0.3
pkg/cmd/pipeline/start.go	67.6%	67.2%	-0.4
pkg/cmd/task/start.go	82.2%	81.9%	-0.3

[danielhelfand]

/retest

[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/clustertask/start.go	80.3%	80.0%	-0.3
pkg/cmd/pipeline/start.go	67.6%	67.2%	-0.4
pkg/cmd/task/start.go	82.2%	81.9%	-0.3

[vdemeester]

/meow
/cc @piyush-garg @pradeepitm12

[tekton-robot]

@vdemeester:

Details

In response to this:

/meow
/cc @piyush-garg @pradeepitm12

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[pradeepitm12]

/lgtm

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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