test(e2e): fix debug mode test timing and add PVC cleanup

[akurinnoy]

What does this PR do?

This PR fixes the debug mode e2e test: waits the test devworkspace for Running status instead of Starting. Also, is adds the AfterEach cleanup step to prevent PVC conflicts.

What issues does this PR fix or reference?

Is it tested? How?

PR Checklist

• E2E tests pass (when PR is ready, comment /test v8-devworkspace-operator-e2e, v8-che-happy-path to trigger)
  • v8-devworkspace-operator-e2e: DevWorkspace e2e test
  • v8-che-happy-path: Happy path for verification integration with Che

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: akurinnoy
Once this PR has been reviewed and has the lgtm label, please assign dkwon17 for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment