Modify scheduler & KCM kubeconfig YAML no parsing

[omertuc]

Avoid parsing YAML for now until
openshift/cluster-kube-scheduler-operator#523 is
fixed, use dumb regex instead

[omertuc]

/test baremetalds-sno-recert-cluster-rename
/test e2e-aws-ovn-single-node-recert-parallel
/test e2e-aws-ovn-single-node-recert-serial

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: omertuc

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[omertuc]

/test baremetalds-sno-recert-cluster-rename
/test e2e-aws-ovn-single-node-recert-parallel
/test e2e-aws-ovn-single-node-recert-serial

[openshift-ci]

@omertuc: 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-aws-ovn-single-node-recert-parallel	4a862a9	link	true	/test e2e-aws-ovn-single-node-recert-parallel

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