[DNM] Test AdditionalRoutingCapabilities promotion

[jcaamano]

… gate

Promoting the feature gate as the deployed daemonset is being used by metallb and covered by MetalLB tests.

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

Hello @jcaamano! Some important instructions when contributing to openshift/api:
API design plays an important part in the user experience of OpenShift and as such API PRs are subject to a high level of scrutiny to ensure they follow our best practices. If you haven't already done so, please review the OpenShift API Conventions and ensure that your proposed changes are compliant. Following these conventions will help expedite the api review process for your PR.

[openshift-ci]

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This pull-request has been approved by: jcaamano
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