Upgrade our GHA using deprecated set-output

[lemeurherve]

Service(s)

GitHub

Summary

The set-output command is deprecated and will be disabled soon.
We have to upgrade jenkins-infra & jenkinsci concerned GitHub Actions to use Environment Files, as explained in the announcement: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Reproduction steps

No response

[lemeurherve]

@NotMyFault many thanks for all these PRs ❤️

FTR, I had to revert one of them.
I found a potential fix to avoid error with multi-lines body, see the code block of this comment

[NotMyFault]

I'll go ahead and close this issue. All PRs needed to upgrade workflows have been created and are merged to a good extent, the CD actions have been released and will be picked up by dependabot to update the reusable workflow repository.

Additionally, PRs outside of Jenkins that I created (e.g., release-drafter, label PR conflicts) are about to be merged and released, which prepares core repositories for the forthcoming deprecations.

[lemeurherve]

https://github.com/jenkins-infra/github-reusable-workflows/releases/tag/v1.1.3 released with the fixes from @NotMyFault 👍