MGMT-17540: Remove unnecessary calls to openshift-versions API in cluster creation page

[jgyselov]

https://issues.redhat.com/browse/MGMT-17540

With these changes, only two calls to the openshift-versions endpoint should be made.

[openshift-ci-robot]

@jgyselov: This pull request references MGMT-17540 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the task to target the "4.17.0" version, but no target version was set.

In response to this:

https://issues.redhat.com/browse/MGMT-17540

With these changes, only two calls to the openshift-versions endpoint should be made.

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ammont82, celdrake, jgyselov

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[openshift-ci]

New changes are detected. LGTM label has been removed.