[release-v0.41.x] Fix spammy logs

[lbernick]

Cherry-pick of e4435e9.

A couple of lines are causing a lot of spam in the controller logs:

• logging the content of steps
• logging that the cache client cannot be find, which is expected since the cache is only available in the Run/CustomRun controller and not for TaskRun and PipelineRun controllers

/kind bug

Submitter Checklist

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

bug fix: reduce log spam

[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/reconciler/events/cloudevent/cloud_event_controller.go	84.9%	88.4%	3.5
pkg/reconciler/taskrun/taskrun.go	84.7%	81.3%	-3.4

[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/reconciler/events/cloudevent/cloud_event_controller.go	84.9%	88.4%	3.5
pkg/reconciler/taskrun/taskrun.go	84.7%	81.3%	-3.4

[vdemeester]

I'll do the same as the other PR.

[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/reconciler/events/cloudevent/cloud_event_controller.go	84.9%	88.4%	3.5
pkg/reconciler/taskrun/taskrun.go	84.7%	81.3%	-3.4

[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/reconciler/events/cloudevent/cloud_event_controller.go	84.9%	88.4%	3.5
pkg/reconciler/taskrun/taskrun.go	84.7%	81.3%	-3.4

[vdemeester]

/approve
/lgtm

[tekton-robot]

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