Support frontend-nlb-tags

[0xlen]

Issue

• Resource tags don't propagate to frontend NLB #4279

Description

This enhancement introduce the new alb.ingress.kubernetes.io/frontend-nlb-tags annotation, which support tagging for front-end NLB resource. Example:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  namespace: game-2048
  name: ingress-2048
  annotations:
    alb.ingress.kubernetes.io/scheme: internet-facing
    alb.ingress.kubernetes.io/target-type: ip
    alb.ingress.kubernetes.io/enable-frontend-nlb: "true"
    alb.ingress.kubernetes.io/frontend-nlb-tags: "Environment=test,Team=platform,Project=aws-load-balancer-controller"

Checklist

• Added tests that cover your change (if possible)
• 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 🌟

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: 0xlen
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[linux-foundation-easycla]

• ✅login: 0xlen / name: Eason Cao / (394df5f)

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[k8s-ci-robot]

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[k8s-ci-robot]

Hi @0xlen. Thanks for your PR.

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[zac-nixon]

Howdy, I can't say that this scenario has come up before but someone implemented & PR'd this same exact feature a day before you here: #4328

I am truly sorry for the wasted time here. We appreciate that you took a look at this issue and wrote up code, but we're going to have to go with the PR that was published earlier.