Conformance: change Service backends without dropping traffic

[arkodg]

What would you like to be added:

With a conformance test, ensure that a client can continuously send traffic to the Ingress without incurring any failures, while the application owner edits the HTTRoute and swaps out the service backend from one healthy backend to another healthy backend.

Relates to https://github.com/kubernetes-sigs/gateway-api/issues/1870

Why this is needed:

To ensure that implementations can atomically swap out and program routes to endpoints in the data plane

[youngnick]

As I said on #1870, I think this one will need to wait until after GA - I don't know if we can mandate zero-failures swapover without talking to implementations first.

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/lifecycle stale

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/lifecycle rotten

[dprotaso]

/lifecycle frozen

this is important

[dprotaso]

/assign @dprotaso

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/lifecycle stale

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/lifecycle rotten

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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

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/close not-planned

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[dprotaso]

/reopen

[k8s-ci-robot]

@dprotaso: Reopened this issue.

In response to this:

/reopen

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[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

In response to this:

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
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/close not-planned

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