🐛 v1alpha5: Fix panic in conversion when port has no binding profile

[mdbooth]

Fixes #1948

/hold

[k8s-ci-robot]

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

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mdbooth

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[mdbooth]

/test pull-cluster-api-provider-openstack-e2e-full-test

[MaysaMacedo]

/lgtm /hold wait for CI

[EmilienM]

/hold cancel