Simplify hybrid nodes for EC2: remove SSM activation, use direct API server connection
- Remove SSM Hybrid Activation (not needed for EC2 instances)
- Simplify IAM role to only EC2 service principal
- Update NodeConfig to use apiServerEndpoint and certificateAuthority
- Remove --credential-provider ssm flag from nodeadm install
- Use standard EC2 instance profile for authentication
- Update documentation to clarify EC2 vs on-premises usage
- Add note about remoteNodeNetworks/remotePodNetworks for true hybrid
Co-authored-by: rcmorano <[email protected]>