Download chectl install script from che-incubator.github.io in tests

[dmytro-ndp]

What does this PR do?

Fix URL where E2E tests is downloading chectl install script from.

What issues does this PR fix or reference?

eclipse-che/che#22925

Is it tested? How?

Note: OpenShift CI tests will be failing in PR because they are running tests from the "main" branch without fix from this PR.

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]

Hi @dmytro-ndp. Thanks for your PR.

I'm waiting for a devfile member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[openshift-ci]

@dmytro-ndp: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/v14-devworkspace-operator-e2e	1e9563e	link	true	/test v14-devworkspace-operator-e2e
ci/prow/v14-images	1e9563e	link	true	/test v14-images

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[AObuchow]

LGTM

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AObuchow, dmytro-ndp, ibuziuk

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