bump OPM: 1.15 -> 1.48

[shajmakh]

Use latest opm https://github.com/operator-framework/operator-registry/tags

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: shajmakh

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[ffromani]

/lgtm

[openshift-ci]

@shajmakh: 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/ci-e2e-install-hypershift	69a9ef2	link	true	/test ci-e2e-install-hypershift

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