Add test for optional address value in httproute

[EyalPazz]

In continuation to:
#3616

[EyalPazz]

/assign

[mlavacca]

Hi @EyalPazz, would you mind adding some context to the issue? What it is about, what we want to achieve, etc.

[EyalPazz]

Sure! Basically it's a follow up to #3616, we need a test to check that implementations that will support an empty address value in Gateway.Spec.Addresses.Value behave correctly (accepted and assigned an address)

[k8s-triage-robot]

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

This bot triages un-triaged 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
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

You can:

• Mark this issue as fresh with /remove-lifecycle stale
• Close this issue with /close
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/lifecycle stale