fix: cilium push.sh skip missing images instead of aborting

[hippogr]

When a local image doesn't exist (e.g. cilium-operator not built), the script now skips it and continues pushing remaining images instead of exiting due to set -e.

[Copilot]

Pull request overview

Updates the Cilium image push helper script so missing local images don’t abort the entire push process under set -euo pipefail, allowing remaining images to be tagged and pushed.

Changes:

• Skip tagging/pushing for images that are not present locally (via docker image inspect).
• Continue pushing other images even if a particular docker push fails, then exit non-zero at the end if any pushes failed.
• Simplify the final completion message.

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

Comments suppressed due to low confidence (1)

src/cilium/build/push.sh:125

• docker image inspect ... &>/dev/null will also fail when the Docker daemon/CLI is unavailable (not just when the image is missing). With this change the script would silently “skip” all images and finish successfully, masking a real failure (previously docker tag/push would fail fast under set -e). Consider adding a preflight docker info check (or similar) before the loop so Docker connectivity issues still cause a hard error.

FAILED=0
for local_img in "${!IMAGE_MAP[@]}"; do
    remote_img="${REGISTRY}/${IMAGE_MAP[$local_img]}"
    if ! docker image inspect "$local_img" &>/dev/null; then
        echo "Skipping ${local_img} (not found locally)"