feat(eks): support alb controller versions 2.7.0-2.8.2

[pahud]

As #29959 has been stale for a while, I am submitting this PR to follow up.

Issue # (if applicable)

Closes #31082

Reason for this change

Description of changes

iam policy files were downloaded using this script

#!/bin/bash

versions=("2.7.0" "2.7.1" "2.7.2" "2.8.0" "2.8.1" "2.8.2")
target_dir="/workspace/aws-cdk/packages/aws-cdk-lib/aws-eks/lib/addons"

for version in "${versions[@]}"; do
    url="https://raw.githubusercontent.com/kubernetes-sigs/aws-load-balancer-controller/v${version}/docs/install/iam_policy.json"
    filename="alb-iam_policy-v${version}.json"
    target_file="${target_dir}/${filename}"

    echo "Downloading ${url} to ${target_file}"
    curl -s "${url}" -o "${target_file}"
done

helm repo updated using

helm repo add eks https://aws.github.io/eks-charts
helm repo update
helm search repo aws-load-balancer-controller --versions --output json

get the app_version and helm version mapping using

$ helm search repo aws-load-balancer-controller --versions --output json | jq -r '.[] | select(.app_version | startswith("v2")) | "\(.app_version) \(.version)"'
v2.8.2 1.8.2
v2.8.1 1.8.1
v2.8.0 1.8.0
v2.7.2 1.7.2
v2.7.1 1.7.1
v2.7.0 1.7.0

Description of how you validated changes

• parameterized tests in the unit tests
• using the latest version in the integ test

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

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

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AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 6e810b6
• Result: SUCCEEDED
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