Extra public IP

[kcolemangt]

@fonzcastellanos cool project! We're using it in fraudmarc-ce.

I might not get to a deeper look or PR soon, but I noticed the instance generated by nat asg provider creates two ENIs with public IPv4 addresses, costing extra $ per month since Feb.

This instance uses 2 public IPs:

natGatewayProvider: new NatAsgProvider({
  instanceType: new cdk.aws_ec2.InstanceType('t3.micro'),
}),

This uses 1 public IP (but lacks ASG support):

natGatewayProvider: cdk.aws_ec2.NatProvider.instanceV2({
  instanceType: new cdk.aws_ec2.InstanceType('t3.micro'),
}),