Always enable Sidekiq health check

What does this MR do?

Always enable Sidekiq health check

This is needed to Sidekiq Pod to stay alive. For more context see: gitlab-org/charts/gitlab#2003 (closed)

Author's Checklist

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

Required

• Ensure a release milestone is set.
• MR title and description are up to date, accurate, and descriptive.
• MR targeting the appropriate branch.
• MR has a green pipeline on GitLab.com.
• When ready for review, MR is labeled workflowready for review per the MR workflow.

Expected

• Test plan indicating conditions for success has been posted and passes.
• Documentation is created or updated.
• Tests are added.

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