Switch to IP Prefixes to support higher Pod Densities per EKS Node

[dj-maisy]

User Need

As a System Engineer
I want our EKS Clusters to use IP Prefixes
so that our EKS Nodes can support more Pods per Node without being capped by Instance IP Limitations

Functional Requirements (What):

• Enable Prefix Delegation
• Configure Prefix Assignment via the WARM_PREFIX_TARGET setting
• Update Node Groups to use the updated config
• Update Node Groups to use the new higher Pod Limit

Acceptance Criteria:

• We're using IP Prefixes
• We're able to schedule more Pods on an EKS Instance

Notes:
Amazon Documentation: https://docs.aws.amazon.com/eks/latest/userguide/cni-increase-ip-addresses.html