Draft: Charts: update dependencies for use in Charts CI specs jobs
What does this MR do and why?
Required for gitlab-org/charts/gitlab!3400 (comment 1564132207).
Updates dependencies in the Charts base image so it can be used for specs-related jobs.
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.