NET-7179: Update MeshGateway to use new proto with workload selector

[NiniOak]

Changes proposed in this PR

• import the workload selector via go.mod to be accessible in consul-k8s. See proto PR here in Consul
• Ensure workloadSelector field is added to gateways CRD

How I've tested this PR

local install and uninstall of Consul

How I expect reviewers to test this PR

Checklist

• Tests added
• CHANGELOG entry added

[nathancoleman]

Nice! You got through the hard part.

To update the CRD definitions, you can just run make ctrl-manifests from here and see the changes to the 2 ...meshgateways.yaml files. You should see the workload bits pop in after running that command.

The interesting thing is that we actually don't want the workload bits to appear in the CRD, so part of this work is figuring out how to make that happen. I suspect that we have 2 options:

• some kubebuilder annotation that tells the CRD generator to skip the field, or
• making our MeshGateway Go type a little more custom to omit the workload selector

[missylbytes]

So we need to also include the WorkloadSelector on this type, so that we can send it in when we register to Consul. The tricky part is making sure this is not added to the CRD, even though it will be present here.

[nathancoleman]

Nice work! Just a couple of small things I noticed

[nathancoleman]

couple of nits on review, about to test it out.

for anyone not in the conversations outside of this PR, we've decided to include the workload selector in the CRD for now and come back to remove it later. This lets us spend our time in the most valuable place possible right now, which is getting TCP traffic working through mesh-gateway.

[nathancoleman]

• Confirmed that MeshGateway CRD created in consul-k8s includes the workload selector
• Confirmed that MeshGateway resource created in consul includes the workload selector
• Confirmed that the ServiceEndpoints resource in consul for the mesh gateway still selects the correct Workloads
• Confirmed that the protocol field on the listeners is written all the way down