added nodegroup update config configuration

[amanravi-squareops]

Configuration for the update strategy of the EKS managed node group.

• max_unavailable_value: Defines how many nodes can be updated at a time.

  • If use_percentage is true, this value represents the percentage of nodes that can be unavailable during updates.
  • If use_percentage is false, this value represents the absolute number of nodes that can be unavailable during updates.

• use_percentage: Determines whether max_unavailable_value should be treated as a percentage or a fixed number.

  • true: max_unavailable_value is interpreted as a percentage (e.g., 50 means 50% of nodes can be unavailable).
  • false: max_unavailable_value is interpreted as an absolute number (e.g., 2 means 2 nodes can be unavailable).