Optimize subnets asignment to IGs for clusters with multiple CIDRs #15923
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The main CIDR is considered special. It will be split into smaller CIDRs to allow it to hold all the control-plane instance groups. This makes these smaller CIDRs less suitable for worker nodes as they will run out of IPs faster, especially when ENIs are used.
/cc @dims @justinsb
@hakuna-matatah