`report-coverage` job failing on `ubuntu-latest`

[chrisrink10]

From #1082 (comment)

It appears that the ubuntu-latest container is using ubuntu-24.04 which raises an error when using pip to install packages outside of a virtualenv (which we are of course doing in the report-coverage CI job because we don't care about maintaining a specific venv for a short-lived job). For now, we just pinned the job to ubuntu-22.04 to allow the job to succeed.

[chrisrink10]

It appears that the ubuntu-latest change was reverted for now. We already pinned report-coverage to 22.04 so this is fine for now, but we'll eventually want to unpin.