[NET-10247] Add Partition and Namespace blocks to external registration acl role/policy

[jm96441n]

NOTE: Dependent on https://github.com/hashicorp/consul/pull/21382

Changes proposed in this PR

• Add Partition and Namespace blocks to external registration acl role/policy
• Make address field optional in the CRD like it is for catalog registraton
• update license headers

How I've tested this PR

• run the start.sh script in the following gist (ensure you have a local build of this branch and of the changes in the linked consul PR in consul-enterprise and have a valid consul license in an env variable named CONSUL_LICENSE
• shell into the bender service and run apk add curl
• run curl zoidberg.virtual.consul and see the request go through
• check the consul connect injector logs to see there are no errors
• view the zoidberg-write-policy to see the namespace block applied

How I expect reviewers to test this PR

Checklist

• [X] Tests added
• [X] CHANGELOG entry added