OCPBUGS-57526: Pick the last IP in the subnet

[rna-afk]

Picking the last IP in the subnet for the internal LBIP. Previously, the 5th IP was being picked due to reservations for the first few IPs but if the users reserver more of the IPs at the start, the LBIP logic will not work. Choosing the last IP now to reduce the chances for error.

[openshift-ci-robot]

@rna-afk: This pull request references Jira Issue OCPBUGS-57526, which is invalid:

• expected the bug to target the "4.20.0" version, but no target version was set

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

In response to this:

Picking the last IP in the subnet for the internal LBIP. Previously, the 5th IP was being picked due to reservations for the first few IPs but if the users reserver more of the IPs at the start, the LBIP logic will not work. Choosing the last IP now to reduce the chances for error.

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

@rna-afk: The following tests 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/okd-scos-e2e-aws-ovn	6b207c9	link	false	/test okd-scos-e2e-aws-ovn
ci/prow/e2e-vsphere-externallb-ovn	6b207c9	link	false	/test e2e-vsphere-externallb-ovn
ci/prow/e2e-azurestack	6b207c9	link	false	/test e2e-azurestack
ci/prow/e2e-azure-ovn-shared-vpc	6b207c9	link	false	/test e2e-azure-ovn-shared-vpc

Full PR test history. Your PR dashboard.

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