[TS-SELENIUM] Cover the "Start a Workspace from a devfile" step from "Happy path" scenario

[Ohrimenko1988]

We have an epic issue where described test scenarios for Che 7 #12728 .
The step №3 is "Start a Workspace from a devfile" :

STEP 3 - Sart a Workspace from a devfile ⚠️

• STEP 3.1 Start a workspace using the devfile generated at step 2.2 using the command chectl worspace:start --devfile=<>/sample-java-postgre-k8s-devfile.yaml
  • Success criteria:
    • Workspace started successfully
    • Workspace is started in less than X seconds
    • Project is cloned
    • JDT LS and Java debug adapter are initialized correctly
    • YAML LS is initialized correctly
    • GitHub plugin is initialized correctly
    • Kubernetes tooling is initialized correctly
    • A pop-up ask to open the application URL
    • Sample application is up and running

We should cover this test by automated test.

[Ohrimenko1988]

Done