Show more than 1 MB of google cloud test logs

[teor2345]

Motivation

In PR #5358, we limited Google Cloud jobs to the last 1MB of test logs, to avoid a GitHub Actions output limit:
https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#outputs-for-docker-container-and-javascript-actions

Designs

We could use log artifacts:
https://docs.github.com/en/actions/using-workflows/storing-workflow-data-as-artifacts

Or modify the ssh-compute GitHub action so it shows the SSH output:
google-github-actions/ssh-compute#29

[teor2345]

We'll need to try the solution in PR #5358, before we know how important this ticket is.