fix: host readiness probe on ipv6 in addition to ipv4

[lucasl0st]

Proposed changes

Problem: the readiness probe endpoint is not available on IPv6. This is a problem on IPv6 only clusters when using IPv6 for the pod network. The gateway pod refuses to come up because the readyz condition never fulfills.
Example:

Warning  Unhealthy  88s (x160 over 26m)  kubelet            Readiness probe failed: Get "http://[fdd3:7046:2ad5:430a:39bb:bc6d:e254:a621]:8081/readyz": dial tcp [fdd3:7046:2ad5:430a:39bb:bc6d:e254:a621]:8081: connect: connection refused

Solution: host the readyz endpoint on IPv6 as well.

Testing: deployed on an IPv6 only cluster, gateway pod now comes up successfully, HTTPRoutes become available.

Checklist

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• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

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please add a brief note that summarizes the change.

Fix an issue regarding the readiness probe for the gateway pod on clusters with IPv6 pod networking

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[lucasl0st]

I have hereby read the F5 CLA and agree to its terms

[lucasl0st]

The failing tests are not because of my changes right? 😅
Because I see them failing on main too

Let me know if I need to check it further

[bjee19]

nice job

[bjee19]

The failing tests are not because of my changes right? 😅
Because I see them failing on main too
Let me know if I need to check it further

Yea I don't think those are because of your changes. We're in the middle of debugging some of these flakey pipeline test runs but you should be good.