Add route port attachment conformance test

[frankbu]

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What type of PR is this?

/kind test /area conformance

What this PR does / why we need it:

Conformance test needed to promote GEP-957 to standard.

Tested and passes with Istio implementation.

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

NONE

[robscott]

Since it looks like Istio is already passing these tests, we need a couple more implementations to also pass these tests to consider this feature ready to graduate to standard channel. Can a few others test this out?

/cc @arkodg @pleshakov @sunjayBhatia

[k8s-ci-robot]

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In response to this:

Since it looks like Istio is already passing these tests, we need a couple more implementations to also pass these tests to consider this feature ready to graduate to standard channel. Can a few others test this out?

/cc @arkodg @pleshakov @sunjayBhatia

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: frankbu, sunjayBhatia

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Needs approval from an approver in each of these files:

• ~~conformance/OWNERS~~ [sunjayBhatia]

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[robscott]

So far we've gotten confirmation that these tests pass on Istio and Contour. We just need one more implementation to confirm that these tests pass for them for this feature to graduate to standard.

@arkodg, @mlavacca, or @pleshakov can any of you confirm if these tests pass on your implementation(s)?

[youngnick]

Updates #957

[frankbu]

Test passes with Envoy Gateway! 😃

cc @arkodg @robscott

[robscott]

Thanks @frankbu! Do you mind making a follow up PR to formally graduate this GEP to standard and remove the experimental tags around the fields?

/lgtm

[frankbu]

Thanks @frankbu! Do you mind making a follow up PR to formally graduate this GEP to standard and remove the experimental tags around the fields?

Already done: #2777