* [management] Add a release-wired UBI image variant
OpenShift and other Red Hat environments expect UBI-based images that run
as an arbitrary non-root UID. The proxy, combined server and rootless
client already ship -ubi variants; this adds the same for management,
published as <version>-ubi and ubi-latest for amd64 and arm64.
The default --port of 80 cannot bind without root, so the image defaults
to 8080. For Let's Encrypt, public 443 forwards to --port and
--letsencrypt-listen-address is empty (#7706), so the main listener
answers the TLS-ALPN challenges.
* [management] Certify the management UBI image
Adds management to the Red Hat certification components. Its Partner
Connect component ID goes in the REDHAT_CERT_ID_MANAGEMENT repository
variable.
