Adjust Node Label Conditions Based on Full Label Name on strechcluster

[OdedViner]

This PR addresses FBUGS-160a and introduces the GetKeyValuesStretchCluster function to resolve an issue with the contains string method. The new function ensures a separation of logic without impacting the existing GetKeyValues function. However, this PR did not resolve the issue: #2841

[openshift-ci]

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[openshift-ci]

@OdedViner: 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/ocs-operator-bundle-e2e-aws	2bf7271	link	true	/test ocs-operator-bundle-e2e-aws

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