Updated documentation to reflect the correct order of deletion for ingress-related resources

[praddy26]

Issue

Fixes #4341

Description

This PR adds documentation about the correct order of deletion for AWS Load Balancer Controller resources, particularly around Ingress and IngressClass resources. The issue arises when users delete IngressClass resources before deleting the associated Ingresses, resulting in orphaned Ingress resources that cannot be cleaned up without manual intervention.

Changes made:

• Added a new section "Resource Cleanup Order" in docs/guide/ingress/ingress_class.md
• Clearly documented the recommended order of deletion (Ingresses first, then IngressClass/IngressClassParams)
• Explained why this order is important and the consequences of incorrect deletion order
• Used consistent documentation style with existing content (MkDocs admonitions)
• Added warning block to highlight potential issues

Checklist

• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested (verified documentation renders correctly with MkDocs)
• 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: praddy26
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[k8s-ci-robot]

Hi @praddy26. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[zac-nixon]

Looks great! Thank you for the doc update :D
/approved
/lgtm

[k8s-ci-robot]

@praddy26: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-aws-load-balancer-controller-e2e-test	6af513c	link	true	/test pull-aws-load-balancer-controller-e2e-test

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[praddy26]

/retest

[k8s-ci-robot]

@praddy26: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.