[SE-5456] Remove self-hosted OracleJDK workaround.

We used a self-hosted OracleJDK package as a workaround since downloading from the official servers would sporadically fail during deployments.

This workaround is no longer needed since the JDK is bundled with ElasticSearch versions used by lilac and newer releases.

See SE-5456 and BB-4097 for more info.

Testing

Verify that with this patch applied, new instances on Ocim deploy successfully. You can check the appserver that I provisioned after deploying the changes to Ocim stage.