[release-4.18] NO-JIRA: UPSTREAM: <carry>: Update rebase.sh to handle go versions major.minor.patch

[openshift-cherrypick-robot]

This is an automated cherry-pick of #2341

/assign dusk125

[openshift-ci-robot]

@openshift-cherrypick-robot: the contents of this pull request could not be automatically validated.

The following commits could not be validated and must be approved by a top-level approver:

• 60e9a62|UPSTREAM: : Update rebase.sh to handle go versions major.minor.patch instead of just major.minor: does not specify an upstream backport in the commit message

Comment /validate-backports to re-evaluate validity of the upstream PRs, for example when they are merged upstream.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

@openshift-cherrypick-robot: 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/e2e-gcp-ovn-upgrade	60e9a62	link	true	/test e2e-gcp-ovn-upgrade
ci/prow/k8s-e2e-gcp-serial	60e9a62	link	true	/test k8s-e2e-gcp-serial

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