Add new Ruby 3.2 version of www-gitlab-com Docker image

What does this MR do and why?

A repeat of: !646 (merged), which had to be reverted in: !650 (merged).

This time we:

• Move the node --version and yarn --version calls so they'll cause the job to fail if something's wrong.
• Make it more obvious where the versions are being set and what they are set to.

Successful jobs:

• https://gitlab.com/gitlab-org/gitlab-build-images/-/jobs/3884627290
• https://gitlab.com/gitlab-org/gitlab-build-images/-/jobs/3884627291

Failed jobs if there's a problem:

• https://gitlab.com/gitlab-org/gitlab-build-images/-/jobs/3884643767
• https://gitlab.com/gitlab-org/gitlab-build-images/-/jobs/3884643769

Success again:

• https://gitlab.com/gitlab-org/gitlab-build-images/-/jobs/3884676945
• https://gitlab.com/gitlab-org/gitlab-build-images/-/jobs/3884676947

Checklist

• (If applicable) Add patches if required for upgrading Ruby version in https://gitlab.com/gitlab-org/gitlab-build-images/-/tree/master/patches/ruby.