build: run ko resolve on build presubmit 🙃
build: run ko resolve on build presubmit 🙃

This run `ko resolve` when doing the presubmit build to be able to
detect any potential "multi-arch" problem with the PRs content.

`ko resolve` is used in our publish pipeline.

Signed-off-by: Vincent Demeester <b98c0fd48a8945096c766de790fe70420dd2f223@redhat.com>

tektoncd/pipeline,tektoncd/pipeline