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.

[openshift-ci]

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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/octavia-operator-build-deploy-kuttl a45a87e link true /test octavia-operator-build-deploy-kuttl

Full PR test history. Your PR dashboard.

error: build error: Failed to push image: trying to reuse blob sha256:4d5d1cbd7ece41ce278c26338e01e2b82e1861b820ca052da9f3e0b16815358f at destination: pinging container registry quay.rdoproject.org: Get "https://quay.rdoproject.org/v2/": dial tcp 38.129.56.158:443: i/o timeout

/test octavia-operator-build-deploy-kuttl