Switch to reusable workflows

[mkurz]

Almost the same like playframework/play-json#705

[mkurz]

@ihostage If you see something that should be changed, please let me know 😉

[ihostage]

Yes, we should release workflows (v1 and v1.0.0) and use

uses: playframework/.github/.github/workflows/sbt.yml@v1

instead 😉
Otherwise we can break an all builds by one small mistake in .github repo 🙃
After successfull test a new version (for example v1.0.1) in one repo we just re-push a tag v1 as link to v1.0.1 and by this action migrate all repos to new stable version 😉
Some details are contained in this GitHub docs https://docs.github.com/en/actions/creating-actions/about-custom-actions#using-release-management-for-actions

[mkurz]

@ihostage I was waiting with tagging for play-ws, play-json and play-soap to see if everything works. Like you suggested here: playframework/playframework#11142 (comment)