network-status: add GW info

[maiqueb]

Hold this PR until default-route feature is fixed in spec (multi-net-spec) and multus-cni (comment by @s1061123, Nov 22, 2021)

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The GW information is missing from the NetworkStatus annotation.

As such, it isn't possible to know which interface currently holds the default route.

[maiqueb]

/cc @s1061123 / @dougbtv / @phoracek

[s1061123]

@maiqueb thank you for the PR, however can we hold this PR for now?
Currently we have some gap about default-route annotation, between spec (multi-net-spec) and implementation and we don't clarify how to fix it.

So we need to fix default-route annotation in spec and multus then proceed the PR.
Thank you so much for your help in advance.

[maiqueb]

@maiqueb thank you for the PR, however can we hold this PR for now? Currently we have some gap about default-route annotation, between spec (multi-net-spec) and implementation and we don't clarify how to fix it.

So we need to fix default-route annotation in spec and multus then proceed the PR. Thank you so much for your help in advance.

Of course. I just wanted to kick this off the ground, and this seemed the easiest way ( to me ...) .

[dougbtv]

Turns out that we actually had the examples in the spec! I went to go make a spec update last week, and... Alas, it's already there.

Then... I realize Miguel already has the code here :D Amazing! So, I think we should probably be ready to merge.

[dougbtv]

I think we might also want to merge against the release-v1.1 branch, too

[dougbtv]

Actually, shoot, we need this

[maiqueb]

@dougbtv can we revisit this ? AFAIU, the IPv6 thing was addressed in multus.

If not, I would appreciate if this PR were updated with the reasons it is being held. Because honestly, right now ... I don't know why.