Update guide for better clarity and to avoid errors (fork of pull request #1475)

[rahulgurnani]

What type of PR is this?

/kind documentation

Originally: #1475

Update the flow of how we deploy gateway resources to avoid errors.

Includes deploying epp and inferencepool first to avoid httproute from failing due to backend not being found
Adding helm clean up instructions

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

[netlify]

✅ Deploy Preview for gateway-api-inference-extension ready!

Name	Link
🔨 Latest commit	a634467
🔍 Latest deploy log	https://app.netlify.com/projects/gateway-api-inference-extension/deploys/68ba1e84e6a736000884946b
😎 Deploy Preview	https://deploy-preview-1524--gateway-api-inference-extension.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[k8s-ci-robot]

Hi @rahulgurnani. 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.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

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.

[nirrozenbaum]

nit: I know it wasn't introduced by your PR, but can you add cleanup also to sim-deployment?
in case someone decides to run the sim deployment it won't be cleaned.

kubectl delete -f https://github.com/kubernetes-sigs/gateway-api-inference-extension/raw/main/config/manifests/vllm/sim-deployment.yaml --ignore-not-found

[nirrozenbaum]

/ok-to-test

[nirrozenbaum]

/retest

[k8s-ci-robot]

PR needs rebase.

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.

[kfswain]

/retest

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: rahulgurnani

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment