Add ginkgo v2 to operator build base
What does this MR do and why?
Adds a ginkgo v2 CLI to the operator build image.
Background
Ginkgo v1 is no longer supported and deprecated in favor of ginkgo v2. The migration to v2 for the operator is currently WIP in gitlab-org/cloud-native/gitlab-operator!574 (merged).
The ginkgo v1 CLI is not removed in this MR to avoid the failure of operator-pipelines without the ginkgo v2 changes.
Relates gitlab-org/cloud-native/gitlab-operator#411 (closed)
Checklist
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(If applicable) Add patches if required for upgrading Ruby version in https://gitlab.com/gitlab-org/gitlab-build-images/-/tree/master/patches/ruby.
Edited by Clemens Beck