Fix publishing to OSSRH

[ovadiagal]

Publishing for java-control-plane is currently broken. Although CI runs and correctly pulls new proto definitions, the publish step is failing because OSSRH is no longer available

Regarding OSSRH sunset:

As of June 30, 2025 OSSRH has reached end of life and has been shut down. All OSSRH namespaces have been migrated to Central Publisher Portal.

If you published via OSSRH, you will need to update your publishing process to accommodate the Publisher Portal. If it meets your use-case, the fastest way to continue publishing is the OSSRH Staging API Service (a compatibility service that translates a subset of the Nexus 2 APIs to the Portal API). If you choose this route, you will need to generate a Portal user token to replace your OSSRH user token, point your plugin at the new service's URL, and potentially add calls to manual endpoints to your build if you are using a "Maven-like" API (e.g. Gradle's default maven-publish plugin).

[ovadiagal]

As per here:

Replace your existing OSSRH endpoint (https://s01.oss.sonatype.org or https://oss.sonatype.org) with https://ossrh-staging-api.central.sonatype.com.

[ovadiagal]

from this example, the new snapshot url is central.sonatype.com/repository/maven-snapshots:

sonatype {
    nexusUrl.set(uri("https://ossrh-staging-api.central.sonatype.com/service/local/"))
    snapshotRepositoryUrl.set(uri("https://central.sonatype.com/repository/maven-snapshots/"))
}

[ovadiagal]

same as here