Create v2 devfiles for Getting Started samples

Is your enhancement related to a problem? Please describe.

One of the sub-epics of Run Che workspaces using the DevWorkspace operator is to switch our samples from a v1 to v2 based devfiles.

Describe the solution you’d like

• Add v2 devfiles in our samples git repositories
• Implement a new “project samples” registry, alternative to the devfile registry
• Add a installation parameter to switch between devfile and sample registry as the source of the getting started samples
• Adapt tests to use devfile v2 based Getting Started samples

Related to https://github.com/eclipse/che/issues/18666

Further details

A simple devfile v2 is the one available here. We should use schemaVersion: 2.1.0 rather than schemaVersion: 2.0.0 (che-server support for it) and the full updated reference is here.

Subtasks

• Add v2.1 devfiles, .che/che-theia-plugins.yaml, .che/che-editor in our samples git repositories (Florent’s note: I think we should use .vscode/extension.json for almost all devfiles)
  • done for one example there: https://github.com/che-samples/java-spring-petclinic/tree/devfilev2
• Create a sample registry (metadata) https://github.com/eclipse/che/issues/19906
  • devfile registry update to include this new service
  • dashboard update to support it
• If devworkspace is deployed, dashboard should use the sample registry https://github.com/eclipse/che/issues/19923
• Adapt QE tests https://github.com/eclipse/che/issues/20913

[sideeffffect]

@svor here are the PRs for Scala/Metals:

• https://github.com/che-samples/scala-sbt/pull/1
• https://github.com/eclipse-che/che-devfile-registry/pull/503

[svor]

@apupier @sideeffffect @filipkroupa @AndrienkoAleksandr we are creating devfiles v2 for getting started samples (more information you can find in the description). It’s already done for some samples, you can check the progress in the spreadsheet. So, I’d like to ask you to take care about the samples which you have contributed.

The procedure should be:

• Create a new branch in sample’s repository (if you don’t have permissions ask me)
• Add devfile.yaml version 2. Here you can find Devfile V2 API, also you can look at existing devfile v2 for quarkus sample
• Add the link to the branch with devfile v2 into meta.yaml in che-devfile-registry, for example take a look at quarkus meta.yaml

If you have any question, please ask me.