It should be able to restart devfile V2 workspace on demand

[vitaliy-guliy]

Is your task related to a problem? Please describe

When the user installed a few plugins, he should be able to restart the workspace to apply the changes.
Atm, the workspace in restarted automatically after installing a plugin #20920

But we need to find a way how to restart it by sending restart request instead of restarting it when changing the devfile.

How to test current behavior?

• create a workspace, using https://github.com/vitaliy-guliy/java-spring-petclinic/tree/devfilev2
• open Plugins panel, install asciidoctor-vscode plugin.

Describe the solution you'd like

It needs to have a service to restart the workspace.

Describe alternatives you've considered

No response

Additional context

No response

[vitaliy-guliy]

We can try to do it in three steps:

1. On the backend, form the list to the dashboard

${CHE_DASHBOARD_URL}/dashboard/#/ide/${DEVWORKSPACE_NAMESPACE}/${DEVWORKSPACE_NAME}

All the variables are set for theia-ide container.
e.g.

CHE_DASHBOARD_URL="https://192.168.49.2.nip.io"
DEVWORKSPACE_NAME="spring-petclinic-fdf3"
DEVWORKSPACE_NAMESPACE="admin-che"

2. stop the workspace with https://github.com/eclipse-che/che-theia/blob/main/extensions/eclipse-che-theia-remote-impl-k8s/src/node/k8s-workspace-service-impl.ts#L90

3. reload the browser, go to the link, taken in step 1

[vitaliy-guliy]

It does not required anymore.
We are able to stop the workspace by patching devworkspace object, then start the workspace with dashboard by switching to URI like following

https://192.168.49.2.nip.io/dashboard/#/ide/namespace/workspace-name