Drop use of knative.dev/pkg/metrics
As part of Knative's migration to OpenTelemetry (as discussed here) we dropped our OpenCensus packages in knative.dev/pkg in the main branch see: https://github.com/knative/pkg/pull/3227
This issue is for Tekton to move off of this package since the next knative.dev/pkg bump will no longer work.
Ideally you'd move to OpenTelemetry - or fork the package.
We will be moving to OpenTelemetry 🥳 cc @khrm
We had an older pr. I just raised a new one.
BTW, we had a discussion with our team. This is causing a breaking change. We should probably mention in lts breaking change notice. 1.6 and do this in 1.7