Automate OLM cleanup for running local operator w/ webhooks

[abays]

When using make run-with-webhook, local versions of the operator and its webhooks are added to the cluster. If the operator was previously installed via OLM, then there might be lingering webhooks from that installation. We've previously been assuming that the user would manually remove them, but we should just get rid of them ourselves since those OLM webhooks need to be deleted anyhow for the local webhooks to function unimpeded. We can also automatically scale down the operator's OLM deployment in such a scenario.

[stuggi]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: abays, stuggi

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[abays]

@abays: 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/ironic-operator-build-deploy-kuttl 72d2d37 link true /test ironic-operator-build-deploy-kuttl

Full PR test history. Your PR dashboard.

{  failed to wait for the created cluster claim to become ready: timed out waiting for the condition}

/test ironic-operator-build-deploy-kuttl