[Test] Improve WebTerminalTest e2e test to check more test steps

[SkorikSergey]

What does this PR do?

For now WebTerminalTest test checks only web terminal starting page. We need to add checking step 4 from Test intergration with DWO document.

What issues does this PR fix or reference?

Eclipse Che issue - #22563

How to test this PR?

1. Install WebTerminal on Openshift from Operator Hub
2. Start WebTerminalTest test.

Test logs

          ▼ OcpMainPage.waitOpenMainPage
            ‣ DriverHelper.waitVisibility - By(css selector, *[id="page-main-header"])
            ‣ DriverHelper.waitVisibility - element is located and is visible.
            ‣ DriverHelper.waitAndClick - By(xpath, //button[@data-quickstart-id="qs-masthead-cloudshell"])
            ‣ DriverHelper.waitVisibility - By(xpath, //button[@data-quickstart-id="qs-masthead-cloudshell"])
            ‣ DriverHelper.waitVisibility - element is located and is visible.
            ‣ DriverHelper.waitPresence - By(xpath, //*[@class="xterm-helper-textarea"])
            ‣ DriverHelper.waitPresence - polling timed out attempt #1, retrying with 1000ms timeout
            ‣ DriverHelper.waitPresence - polling timed out attempt #2, retrying with 1000ms timeout
            ‣ DriverHelper.waitPresence - polling timed out attempt #3, retrying with 1000ms timeout
            ‣ DriverHelper.waitPresence - polling timed out attempt #4, retrying with 1000ms timeout
            ‣ DriverHelper.waitPresence - polling timed out attempt #5, retrying with 1000ms timeout
    ✔ Open Web Terminal
          ▼ ShellExecutor.executeCommand - oc get user $(oc whoami) -o jsonpath={.metadata.uid}
7a7e552e-28b7-49cf-b6c4-bfc790dbf114          ▼ ShellExecutor.executeCommand - oc get dw -A -l console.openshift.io/terminal=true,controller.devfile.io/creator=7a7e552e-28b7-49cf-b6c4-bfc790dbf114 -o jsonpath='{.items[0].metadata.namespace}'
openshift-terminal          ▼ ShellExecutor.executeCommand - oc get dw -A -l console.openshift.io/terminal=true,controller.devfile.io/creator=7a7e552e-28b7-49cf-b6c4-bfc790dbf114 -o jsonpath='{.items[0].status.devworkspaceId}'
workspace761cd28d480443be          ▼ ShellExecutor.executeCommand - oc exec -n openshift-terminal deploy/workspace761cd28d480443be -c web-terminal-tooling -- oc whoami
admin
          ▼ ShellExecutor.executeCommand - oc whoami
admin
    ✔ Check username is correct

            ‣ Context.deleteAllWorkspacesOnFinish - Property DELETE_WORKSPACE_ON_FAILED_TEST is true - trying to stop and delete all running workspace after test run with API.
          ▼ TestWorkspaceUtil.stopAndDeleteAllRunningWorkspaces
          ▼ ApiUrlResolver.obtainUserNamespace
            ‣ ApiUrlResolver.obtainUserNamespace - USER_NAMESPACE.length = 0, calling kubernetes API
            ‣ DriverHelper.getDriver
            ‣ Context.deleteAllWorkspacesOnFinish - Running workspaces not found
            ‣ DriverHelper.wait - (5000 milliseconds)
            ‣ DriverHelper.quit
            ‣ DriverHelper.getDriver

  2 passing (33s)

PR Checklist

As the author of this Pull Request I made sure that:

• The Eclipse Contributor Agreement is valid
• Code produced is complete
• Code builds without errors
• Tests are covering the bugfix or new feature
• The repository devfile is up to date and works
• Sections What issues does this PR fix or reference and How to test this PR completed
• Relevant user documentation updated
• Relevant contributing documentation updated
• CI/CD changes implemented, documented and communicated

Reviewers

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