chore: lower jvm glibc to 22.04

[chebbyChefNEQ]

lower to ubuntu 22.04 to get better glibc compatibility

[Copilot]

Pull Request Overview

This PR updates the Ubuntu version used in GitHub workflows to Ubuntu 20.04 to improve glibc compatibility. The key changes include:

• Updating the "rust-clippy-fmt" job to use ubuntu-20.04.
• Updating the "build-and-test-java" job to use ubuntu-20.04.
• Updating the "linux-x86" job in the java-publish workflow to use ubuntu-20.04.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/java.yml	Changed two job environments from ubuntu-24.04 to ubuntu-20.04
.github/workflows/java-publish.yml	Changed linux-x86 job environment from ubuntu-24.04 to ubuntu-20.04

[westonpace]

Yeah, I think to get to 20.04 we'd have to run a docker-based build (but that might not be too hard).

[jackye1995]

Added docker build for java publishing in #3703, but that PR continues to use 24.04 for testing. The publishing workflow also uses 24.04 as the base runner and only uses docker to run the build steps in 20.04. We can continue to evaluate if we want to switch everything to 22.04 here.