conformance: add attachedRoutes to conformance tests

[ChaningHwang]

What type of PR is this?
/kind feature
/area conformance

What this PR does / why we need it:
Add attachedRoutes to conformance tests.

Which issue(s) this PR fixes:
Fixes #1543

Does this PR introduce a user-facing change?:
NONE

[k8s-ci-robot]

Hi @ChaningHwang. Thanks for your PR.

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[robscott]

Thanks @ChaningHwang!

/ok-to-test

[robscott]

Thanks @ChaningHwang! This looks like a good start. Although this doesn't have to block merging this PR, I'd like to have this kind of logic in place across more tests before marking the linked issue as fixed.

[shaneutt]

At the time I'm reading this, we're only testing for conditions where AttachedRoutes is expected to be 0, but to cover AttachedRoutes in conformance we should in fact include some tests where it would be 1 and more.

[frankbu]

This doesn't address the question of whether or not the attachedRoutes count should include routes that are attached to invalid not ready Gateways, but maybe the spec isn't going to mandate that one way or another?

Otherwise LGTM

[shaneutt]

Thanks for adding the positive cases, and thanks for your contribution! Targeting this for v0.7.0.

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ChaningHwang, frankbu, shaneutt

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• conformance/OWNERS [shaneutt]

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