Fix the PR image comment job

[leandroberetta]

Description

The comment on PR job of push_image_pr.yml has been failing since #12fc3df7 (Secure push job wrt branch interpolation) split the workflow into separate jobs:

ReferenceError: fs is not defined

Two things were lost in that split: the var fs = require('fs') line, and the artifact download step — ./commands-url lives in the pr artifact, which only the push job fetches.

The effect is that the image is built and pushed fine, but no comment is posted, so PR authors and QE never learn the image tag. On #552 that led to QE running the PR's plugin script against quay.io/netobserv/network-observability-cli:main (the default in commands/netobserv), whose binary does not have the new resolve-tls subcommand, and the collector pod failed with unknown command "resolve-tls".

Fix: read the URL in the push job, which already has the artifact, and pass it to the comment job as a job output, in the same env-var style the rest of that script uses.

Dependencies

n/a

Checklist

• Does the changes in PR need specific configuration or environment set up for testing?
  • if so please describe it in PR description.
• I have added thorough unit tests for the change.
• QE requirements (check 1 from the list):
  • Standard QE validation, with pre-merge tests unless stated otherwise.
  • Regression tests only (e.g. refactoring with no user-facing change).
  • No QE (e.g. trivial change with high reviewer's confidence, or per agreement with the QE team).

Note that this workflow can only be exercised by a real ok-to-test label event, so the first labelled PR after this merges is the actual verification.

🤖 Generated with Claude Code

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[openshift-ci]

@leandroberetta: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/integration-tests	cbf6f26	link	true	/test integration-tests

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