Net 12039 terminating gateway acl policy fix

[natemollica-nm]

Changes proposed in this PR

• Introduce handling of Consul AdminPartition ACL policy rules when global.adminPartitions.enabled: true

Current workflow requires end users to manually update the Terminating Gateway policies applied by the TerminatingGateway resource controller when AdminPartitions are enabled from:

namespace "default" {
  service_prefix "" {
    policy = "write"
  }
}

to

partition "default" {
  namespace "default" {
    service_prefix "" {
      policy    = "write"
      intention = "read"
    }
  }
}

How I've tested this PR

• Clone consul-k8s repository to $HOME/HashiCorp/consul-k8s
• Apply this branch's commits to locally cloned repo.
• Using https://github.com/hashicorp-support/consul-k3d-multicluster
  • From this repo, run make install-dev to deploy dev image with changes
• Verify the desired results of Consul ACL TerminatingGateway generated policies:

Test Matrix for ACL Policies and Admin Partitions with Terminating Gateway

Test Case	Admin Partitions Enabled	Partition Name	Service Type	Expected ACL Policy
Default Partition, Wildcard	Yes	default	Wildcard (*)	partition "default" { namespace "default" { service_prefix "" { policy = "write"; intention = "read"; } } }
Default Partition, Specific	Yes	default	Specific (static-server)	partition "default" { namespace "default" { service "static-server" { policy = "write"; intention = "read"; } } }
Non-Default Partition, Wildcard	Yes	dev	Wildcard (*)	partition "dev" { namespace "default" { service_prefix "" { policy = "write"; intention = "read"; } } }
Non-Default Partition, Specific	Yes	dev	Specific (static-server)	partition "dev" { namespace "default" { service "static-server" { policy = "write"; intention = "read"; } } }
No Partition, Wildcard	No	N/A	Wildcard (*)	namespace "default" { service_prefix "" { policy = "write"; intention = "read"; } }
No Partition, Specific	No	N/A	Specific (static-server)	namespace "default" { service "static-server" { policy = "write"; intention = "read"; } }

How I expect reviewers to test this PR

👀

Checklist

• [] Tests added
• CHANGELOG entry added