[Feature] Upgrade to a modern version of Java

[cclauss]

Willingness to contribute

{"label"=>"No. I cannot contribute a bug fix at this time.", "value"=>"cannot_contribute"}

Feature Request Proposal

README.md currently says:

OpenHouse is currently built with Java 8, and will be modernized soon.

https://www.java.com/releases https://en.wikipedia.org/wiki/Java_version_history

Motivation

A more modern software base will ease integration with current tools and practices.

What component(s) does this feature affect?

• [ ] Table Service: This is the RESTful catalog service that stores table metadata. :services:tables
• [ ] Jobs Service: This is the job orchestrator that submits data services for table maintenance. :services:jobs
• [ ] Data Services: This is the jobs that performs table maintenance. apps:spark
• [ ] Iceberg internal catalog: This is the internal Iceberg catalog for OpenHouse Catalog Service. :iceberg:openhouse
• [ ] Spark Client Integration: This is the Apache Spark integration for OpenHouse catalog. :integration:spark
• [ ] Documentation: This is the documentation for OpenHouse. docs
• [ ] Local Docker: This is the local Docker environment for OpenHouse. infra/recipes/docker-compose
• [ ] Other: Please specify the component.

Details

As part of this process, these lines should also be removed: https://github.com/linkedin/openhouse/blob/a9a8726c704c0adda07300891dc2c4800de696b9/.github/dependabot.yml#L14-L16