Make `quarkus-oidc-common` aware of `quarkus-proxy-registry`

[ppalaga]

#50709 brings the new global proxy configuration that works much like TLS registry.
quarkus-oidc-common, cf. io.quarkus.oidc.common.runtime.config.OidcCommonConfig.Proxy should be made aware of it in a simlar way like reactive REST client in #50709

[quarkus-bot]

/cc @pedroigor (oidc), @sberyozkin (oidc)