tekton-pipeline-controller: use distroless-base:latest
The original upstream change commit: https://github.com/tektoncd/pipeline/commit/82e145ebec6bc1350554547c861808aee0e3c2c8
CRI-O now supports tag + digest: https://github.com/cri-o/cri-o/issues/2351
But moreover, we don't use CRI-O in our kubernetes clusters.
Using a tag may be a more robust approach, since some registry cleanup operation may flush images without tags.
Bug: T321188 Signed-off-by: Arturo Borrero Gonzalez aborrero@wikimedia.org