update helm chart for ServiceTargetENISGTags and README

[oliviassss]

Issue

#3556
#3501

Description

• Adds helm chart field serviceTargetENISGTags to config controller flag --service-target-eni-security-group-tags
• Adds explanation on the use case for enabling HPA on controller
• bumps up chart version to v1.7.1

manual test

Published the new chart to my personal eks-chart, upgraded the deployment via helm chart with the config of serviceTargetENISGTags and verified the controller was up and running with the flag set

dev-dsk-sonyingy-2c-61cf589a % helm repo update eks-test
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "eks-test" chart repository
Update Complete. ⎈Happy Helming!⎈

dev-dsk-sonyingy-2c-61cf589a % helm search repo aws-load-balancer-controller | grep eks-test
eks-test/aws-load-balancer-controller	1.7.1        	v2.7.0     	AWS Load Balancer Controller Helm chart for Kub...

dev-dsk-sonyingy-2c-61cf589a % helm upgrade -i aws-load-balancer-controller eks-test/aws-load-balancer-controller -n kube-system --set clusterName=dev-128 --set serviceTargetENISGTags=Name=my-name --set serviceAccount.create=false --set serviceAccount.name=aws-load-balancer-controller
Release "aws-load-balancer-controller" has been upgraded. Happy Helming!
NAME: aws-load-balancer-controller
LAST DEPLOYED: Tue Feb  6 00:35:36 2024
NAMESPACE: kube-system
STATUS: deployed
REVISION: 2
TEST SUITE: None
NOTES:
AWS Load Balancer controller installed!

dev-dsk-sonyingy-2c-61cf589a % k describe deployments.apps -n kube-system aws-load-balancer-controller                                             
Name:                   aws-load-balancer-controller
Namespace:              kube-system
CreationTimestamp:      Fri, 19 Jan 2024 23:34:39 +0000
Labels:                 app.kubernetes.io/instance=aws-load-balancer-controller
                        app.kubernetes.io/managed-by=Helm
                        app.kubernetes.io/name=aws-load-balancer-controller
                        app.kubernetes.io/version=v2.7.0
                        helm.sh/chart=aws-load-balancer-controller-1.7.1
...

dev-dsk-sonyingy-2c-61cf589a % k get pods -n kube-system | grep aws-load-balancer-controller
aws-load-balancer-controller-56d686f7ff-9bwz8   1/1     Running   0          46s
aws-load-balancer-controller-56d686f7ff-tpcmt   1/1     Running   0          36s
 
dev-dsk-sonyingy-2c-61cf589a % k describe deployments.apps -n kube-system aws-load-balancer-controller | grep service-target-eni-security-group-tags
      --service-target-eni-security-group-tags=Name=my-name

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ed00c81) 55.28% compared to head (0d5f45d) 55.35%.
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3558      +/-   ##
==========================================
+ Coverage   55.28%   55.35%   +0.07%     
==========================================
  Files         149      149              
  Lines        8950     8971      +21     
==========================================
+ Hits         4948     4966      +18     
- Misses       3664     3666       +2     
- Partials      338      339       +1     

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[M00nF1sh]

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: M00nF1sh, oliviassss

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