Build the native image as part of the release process

[ggrossetie]

What I Did

• Export release_version as a job output using gradle properties -q | grep "version:" | awk '{print $2}'
• Replace POM_VERSION by RELEASE_VERSION in release-snapshot.sh and release.sh
• Add the Linux binary (amd64) in the release directory
• Introduce a job named build_artifacts to build PlantUML
• Add a new job named native_images to build native images from the artifacts (i.e., jar files) produced by build_artifacts
• Use actions/cache/save@v3 and actions/cache/restore@v3 to share artifacts between jobs
• Call .github/workflows/native-image.yml (reusable workflow) in ci.yml

Here's the build artifact uploaded on the CI workflow:

As you can see, there' a plantuml-linux-amd64-M.YYYY.m-SNAPSHOT binary included.

[ggrossetie]

Artifacts attached: https://github.com/plantuml/plantuml/actions/runs/4520961820?pr=1360

[ggrossetie]

Yay, I can see the native image in the snapshot release: https://github.com/plantuml/plantuml/releases/tag/snapshot 🎉
I will try to build a native image for macOS and Windows 😄

[arnaudroques]

I will try to build a native image for macOS and Windows

Yes, having native image is really more convenient for some people!
Many thanks for your help!

[The-Lum]

Only just one question ('in French: juste pour ma gouverne'):

• Why Replace POM_VERSION by RELEASE_VERSION?

Regards.