[Feature] eksctl update addon "--resolve-conflicts" flag

[aws-patrickc]

What feature/behavior/change do you want?

Currently eksctl update addon command does not include the "--resolve-conflicts" flag as can be seen on v0.153.0 or later:

 eksctl update addon -h
Upgrade an Addon

Usage: eksctl update addon [flags]

Addon flags:
      --name string                                    Addon name
      --version eksctl utils describe-addon-versions   Add-on version. Use eksctl utils describe-addon-versions to discover a version or set to "latest"
      --service-account-role-arn string                Addon serviceAccountRoleARN
      --force                                          Force migrates an existing self-managed add-on to an EKS managed add-on
      --wait                                           Wait for the addon update to complete

General flags:
  -c, --cluster string       EKS cluster name
  -r, --region string        AWS region. Defaults to the value set in your AWS config (~/.aws/config)
  -f, --config-file string   load configuration from a file (or stdin if set to '-')
      --timeout duration     maximum waiting time for any long-running operation (default 25m0s)

AWS client flags:
  -p, --profile string   AWS credentials profile to use (defaults to the value of the AWS_PROFILE environment variable)

Common flags:
  -C, --color string   toggle colorized logs (valid options: true, false, fabulous) (default "true")
  -d, --dumpLogs       dump logs to disk on failure if set to true
  -h, --help           help for this command
  -v, --verbose int    set log level, use 0 to silence, 4 for debugging and 5 for debugging with AWS debug logging (default 3)

Use 'eksctl update addon [command] --help' for more information about a command.

Ideally we should be able to run something like:

eksctl update addon --name vpc-cni --version 1.8.0 --service-account-role-arn <new-role> --resolve-conflicts Preserve
eksctl update addon --name vpc-cni --version 1.8.0 --service-account-role-arn <new-role> --resolve-conflicts Overwrite

Why do you want this feature?

"eksctl" is used extensively to manage EKS clusters and add-ons, it would be great to have the ability to update the add-on with using eksctl command to preserve or overwrite any conflict as per the AWS CLI

https://docs.aws.amazon.com/cli/latest/reference/eks/update-addon.html