Che Theia stable happy path should use stable e2e tests source code

[sleshchenko]

Describe the bug

Currently, Che Theia has next and stable happy path checks.
Both use e2e source code from Che master branch, but one use the next Che Server, when another the latest released.
Which lead to failure in case master e2e source code does not correspond the released version (Theia or Dashboard).

Like here https://github.com/eclipse-che/che-theia/pull/1067/checks?check_run_id=2330948745

            ‣ DriverHelper.waitVisibility - Polling timed out attempt #239, retrying with 1000ms timeout
            ‣ DriverHelper.waitVisibility - Polling timed out attempt #240, retrying with 1000ms timeout
    1) Start workspace
Error: R] CheReporter runner.on.fail: Validation of workspace start Start workspace failed after 242453ms


  1 passing (4m)
  1 failing

  1) Validation of workspace start
       Start workspace:
     TimeoutError: Exceeded maximum visibility checkings attempts for 'By(xpath, //div[@id='page-sidebar']//a[contains(text(), 'Workspaces (')])' element, timeouted after 240000

e2e tests expect Workspaces ( to be present, but the latest released version has Workspaces text on dashboard

Che version

• latest
• nightly
• other: please specify

Steps to reproduce

Expected behavior

Runtime

• kubernetes (include output of kubectl version)
• Openshift (include output of oc version)
• minikube (include output of minikube version and kubectl version)
• minishift (include output of minishift version and oc version)
• docker-desktop + K8S (include output of docker version and kubectl version)
• other: (please specify)

Screenshots

Installation method

• chectl
  • provide a full command that was used to deploy Eclipse Che (including the output)
  • provide an output of chectl version command
• OperatorHub
• I don't know

Environment

• my computer
  • Windows
  • Linux
  • macOS
• Cloud
  • Amazon
  • Azure
  • GCE
  • other (please specify)
• Dev Sandbox (workspaces.openshift.com)
• other: please specify

Eclipse Che Logs

Additional context