USHIFT-3784: Removed manage_vm_connections.sh and PUBLIC_IP

[vanhalenar]

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[openshift-ci-robot]

@vanhalenar: This pull request references USHIFT-3784 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 story to target the "4.18.0" version, but no target version was set.

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[ggiguash]

The public_ip file seems to be also used in test/scenarios/periodics/el94-src@cncf-conformance.sh.
The error did not come up in the tests because we explicitly exclude CNCF test from presubmits because it takes over 2h.

We need to also fix the test.
/hold

[ggiguash]

/lgtm
/unhold

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ggiguash, vanhalenar

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[openshift-ci]

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