Update guide for better clarity and to avoid errors

[rlakhtakia]

/kind documentation

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

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[k8s-ci-robot]

Hi @rlakhtakia. 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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[zetxqx]

Thank you for the quick update! @rlakhtakia

[ahg-g]

/ok-to-test

[ahg-g]

the cleanup instructions needs to be updated to use helm uninstall to remove the inference pool resources instead of pointing to inferencepool-resources.yaml

[liu-cong]

/lgtm

[nirrozenbaum]

/retest

[ahg-g]

/lgtm
/approve

Thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahg-g, rlakhtakia

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