test(serial): add new iotune/non-devmode cluster test

[abramche]

Description of your changes:

• create a new test deploying production mode cluster (we do not have any)
• restart it and assert that iotune is not performed after restart

Which issue is resolved by this Pull Request:
Resolves https://scylladb.atlassian.net/browse/OPERATOR-155

/kind flake
/priority important-soon

[scylla-operator-bot]

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

[scylla-operator-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

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[abramche]

/test images
/test e2e-gke-serial

[abramche]

/test images
/test e2e-gke-serial

[scylla-operator-bot]

@abramche: The following test 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/e2e-gke-serial	84f3952	link	true	/test e2e-gke-serial

Full PR test history. Your PR dashboard.

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