Ask the HPA for more API Pods

What does this MR do?

• Our Apdex has been suffering since the move to Kubernetes, due to this we need to add capacity to relieve the pressure the current Pods are dealing with.
• Modifying our scale target should bump up the amount of Pods utilized by each cluster by 12%.
  • We are currently hoving between 33 and 38 Pods across all clusters
  • This change should induce roughly 5 additional Pods across each cluster

Addresses: gitlab-com/gl-infra/production#5359 (closed) observed low apdex

Author Check-list

Please read the Contributing document and once you do, complete the following:

• Assign to the correct reviewer per the contributing document
• Apply the correct metadata per the contributing document
• Link to related MRs for applying the changes on other environments
• Link to related Chef changes
• If necessary link to a Criticality 4 Change Request issue

Reviewer Check-list

• Reviewed the diff jobs to confirm changes are as expected
• No changes shown in the diffs not associated with this MR - This may require a rebase or further investigation