Fix broken terraform plan/apply on a cluster < 1.14 (Fix #582)

[hodduc]

PR o'clock

Description

Fix issue #582. I followed suggestion here with some modification.

Also, I checked every AWS region to check existence of that image.

aws ec2 describe-images --owners 801119661308 --filters "Name=platform,Values=windows" "Name=name,Values=Windows_Server-2019-English-Core-EKS_Optimized-1.14-*" --region=$region | jq '.Images | .[] | [.Name, .ImageId, .CreationDate]'

Results: Windows_Server-2019-English-Core-EKS_Optimized-1.14-* AMI exists on all regions except ca-central-1 and us-west-1. But EKS is not available on ca-central-1 & us-west-1, so this is OK.

Checklist

• Change added to CHANGELOG.md. All changes must be added and breaking changes and highlighted
• CI tests are passing
• README.md has been updated after any changes to variables and outputs. See https://github.com/terraform-aws-modules/terraform-aws-eks/#doc-generation

[max-rocket-internet]

Thanks @hodduc

[github-actions]

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