chore(eks): improve documentation for updating a cluster

[colifran]

Reason for this change

In our EKS documentation, we note that you need to add a temporary policy to the cluster admin role for
successful replacement when renaming a cluster. The temporary policy we recommend adding to the cluster admin role is:

cluster.adminRole.addToPolicy(new iam.PolicyStatement({
  actions: [
    'eks:DeleteCluster',
  ],
  resources: [ 
    Stack.of(this).formatArn({ service: 'eks', resource: 'cluster', resourceName: 'foo' }),
	]
}))

Changing the cluster name is an update that requires replacement. This will cause the old cluster to be automatically deleted by CloudFormation upon success. Since this policy doesn't have the eks:DescribeCluster action, the delete will fail:

Description of changes

Added eks:DescribeCluster to the actions of the recommended temporary policy.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[piradeepk]

Lgtm 🚀

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 2381a44
• Result: SUCCEEDED
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[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

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