gitlab-runner v19.3.2 released: review CRD and behaviour

[github-actions]

Upstream released v19.3.2; DefaultRunnerImage pins v19.3.0.

• Release notes
• CHANGELOG
• Runner image: gitlab/gitlab-runner:alpine-v19.3.2

Executor config

Could not read the upstream executor config for v19.3.0 or v19.3.2.
Compare the executor config by hand before closing this.

Helper image

Helper image published for v19.3.2 (69 tags). Linux flavours:

• (default)
• alpine-edge
• alpine-latest
• alpine3.21
• concrete
• ubi-fips
• ubuntu

Before closing

• Decide whether any added key needs a CRD field in api/v1beta2.
• Check the release notes for behaviour changes the reconciler assumes.
• Bump DefaultRunnerImage and let e2e exercise the new runner.