Revert "Install metallb per default"

[karelyatin]

Reverts #975

It broke openstack-operator kuttl job.

[openshift-ci]

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[stuggi]

this was introduced because of a broken kuttl tests. the infra-operator now required the metallb CRD do be installed for managing FRR configurations for BGP environments.

[stuggi]

adding a hold for now

[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/04ac0d55537d4c289dbdd7dd182a336d

❌ openstack-k8s-operators-content-provider NODE_FAILURE Node request 100-0007705168 failed in 0s
⚠️ install-yamls-crc-podified-edpm-baremetal SKIPPED Skipped due to failed job openstack-k8s-operators-content-provider
⚠️ podified-multinode-edpm-deployment-crc SKIPPED Skipped due to failed job openstack-k8s-operators-content-provider

[openshift-ci]

@karelyatin: 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/install-yamls-deploy	501838b	link	false	/test install-yamls-deploy

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[karelyatin]

it confirmed that this patch triggered the issue and now issue in openstack-operator kuttl tests is fixed with openstack-k8s-operators/infra-operator#331