feat: print x/y progress to the stdout

[ricardomaraschini]

What this PR does / why we need it:

print a counter to show progress while pushing images and embedded cluster artifacts to the registry. we want this output so we can show a better feedback to the user when installing a kots application on an embedded cluster instance.

output sample:

root@ec:~#  /var/lib/embedded-cluster/bin/kubectl-kots \
        install \
        embedded-cluster-smoke-test-staging-app/ci-airgap \
        --license-file ./license.yaml \
        --namespace kotsadm \
        --app-version-label appver-dev-7976976 \
        --exclude-admin-console \
        --airgap-bundle ./embedded-cluster-smoke-test-staging-app.airgap
  • Validating registry information ✓
  • Deploying application
Pushing image 1/1
Pushing image 10.103.35.61:5000/embedded-cluster-smoke-test-staging-app/nginx:latest
Copying blob 035788421403 skipped: already exists
Copying blob c5cdd1ce752d skipped: already exists
Copying blob 8a1e25ce7c4f skipped: already exists
Copying blob 87c3fb37cbf2 skipped: already exists
Copying blob 39fc875bd2b2 skipped: already exists
Copying blob e78b137be355 skipped: already exists
Copying blob 33952c599532 skipped: already exists
Copying config 92b11f6764 done   |
Writing manifest to image destination
Pushing embedded cluster artifact 1/4
Pushing embedded cluster artifact 2/4
Pushing embedded cluster artifact 3/4
Pushing embedded cluster artifact 4/4
  • Waiting for Admin Console to be ready ✓
  • Uploading app archive
  • Waiting for installation to complete ✗
Error: failed to validate installation: license already exists for app embedded-cluster-smoke-test-staging-app
root@ec:~#

Which issue(s) this PR fixes:

Relates #102373

Does this PR introduce a user-facing change?

Add more feedback to the user while pushing Images and Embedded Cluster artifacts.

[chris-sanders]

Proxying a comment from slack. Can we just show "Pushing Image 1/1" and update that line until all of the images are pushed, and then move on to showing "Pushing Embedded Cluster Artifact 1/4". The rest can be filtered, and of course it would be nice if we could put it back in the bullet point like the other lines.

Basically treat each of the "Pushing" lines the way we do the 0/2 for Admin console.

[ajp-io]

We can disregard Chris's comment proxied from Slack. I looked at the terminal output in the PR description, which was not up to date. I like what is in the code, so this is good.