feat: add default ingressclass annotation ✨

[meysam81]

Issue

Fixes: #2738
A replacement for aws/eks-charts#792

Description

Any ingressclass out there has the option to be the default ingressclass if the right value is passed to the chart. This is the reason behind this PR so that with passing a single value, we can have the ingressclass as the default inside the cluster.

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 🌟

[k8s-ci-robot]

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[k8s-ci-robot]

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[meysam81]

@M00nF1sh
@kishorj
@oliviassss
@johngmyers

[kishorj]

lets have in this structure

# ingressClassConfig contains configurations specific to the ingress class
ingressClassConfig:
    default: true

We will group the remaining ingress class configurations under this later.

[meysam81]

@kishorj done ✅

[kishorj]

/ok-to-test

[codecov-commenter]

Codecov Report

Base: 54.04% // Head: 54.03% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (482b8f6) compared to base (0d91884).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2756      +/-   ##
==========================================
- Coverage   54.04%   54.03%   -0.02%     
==========================================
  Files         144      144              
  Lines        8223     8225       +2     
==========================================
  Hits         4444     4444              
- Misses       3461     3463       +2     
  Partials      318      318              

Impacted Files	Coverage Δ
pkg/deploy/elbv2/load_balancer_synthesizer.go	40.90% <0.00%> (-0.96%)	⬇️

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[kishorj]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kishorj, meysam81

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