[Feature] Attach security groups to managed node groups by name

[henryzhao95]

What feature/behavior/change do you want?

For ClusterConfig.managedNodeGroups.securityGroups supported attaching security groups by name instead of just SG IDs solely (securityGroups.attachIDs).

Why do you want this feature?

For our ClusterConfig infrastructure as code to be reusable and resilient to catastrophic events such as the deletion of everything in our AWS workspace which would involve recreating the security groups with different IDs (as well as more readable).