Ensure we install the gems during build cache update

What does this MR do?

Fix for issue introduced in !4989 (merged) where the new cache update failed to install the gems first.

Checklist

See Definition of done.

For anything in this list which will not be completed, please provide a reason in the MR discussion

Required

• Merge Request Title, and Description are up to date, accurate, and descriptive
• MR targeting the appropriate branch
• MR has a green pipeline on GitLab.com
• Pipeline is green on dev.gitlab.org if the change is touching anything besides documentation or internal cookbooks
• trigger-package has a green pipeline running against latest commit

Expected (please provide an explanation if not completing)

• Test plan indicating conditions for success has been posted and passes
• Documentation created/updated
• Tests added
• Integration tests added to GitLab QA
• Equivalent MR/issue for the GitLab Chart opened

changed milestone to %13.9

added devopssystems groupdistribution maintenancepipelines sectioncore platform labels

added tooling (archive) label

requested review from @balasankarc

assigned to @balasankarc

mentioned in merge request !4989 (merged)

The Trigger:ee-package job from pipeline https://gitlab.com/gitlab-org/omnibus-gitlab/-/pipelines/253228925 triggered https://gitlab.com/gitlab-org/build/omnibus-gitlab-mirror/-/pipelines/253229998 downstream.

The Trigger:qa-test job from pipeline https://gitlab.com/gitlab-org/build/omnibus-gitlab-mirror/-/pipelines/253229998 triggered https://gitlab.com/gitlab-org/gitlab-qa-mirror/-/pipelines/253257399 downstream.

The gitlab-qa downstream pipeline failed! .

merged

mentioned in commit 5827e491

added workflowstaging label

added workflowcanary label and removed workflowstaging label

added workflowstaging label and removed workflowcanary label

added workflowcanary label and removed workflowstaging label

added workflowproduction label and removed workflowcanary label

added workflowstaging label and removed workflowproduction label

added workflowcanary label and removed workflowstaging label

added workflowproduction label and removed workflowcanary label

mentioned in commit cf92d647

added releasedcandidate label

added releasedpublished label and removed releasedcandidate label

added workflowstaging-ref label and removed workflowproduction label

Due to an issue the workflowstaging-ref label was incorrectly applied to this merge request. Re-setting back to workflowproduction using https://gitlab.com/gitlab-org/release-tools/-/merge_requests/1620

added workflowproduction label and removed workflowstaging-ref label

added typemaintenance label and removed tooling (archive) label