Description of problem:
When deploying CNV, starting from v4.11.0-334, node-maintenance-operator is being fetched by OLM according to a dependency set in CNV bundle.

The problem is that NMO supports AllNamespaces InstallMode and doesn't support other InstallModes, while CNV supports only OwnNamespace and SingleNamespace.
Due to this discrepancy, because the OperatorGroup is targeting a single namespace (openshift-cnv), NMO CSV is failed to be installed.

$ oc get csv
NAME                                       DISPLAY                     VERSION   REPLACES                                   PHASE
kubevirt-hyperconverged-operator.v4.11.0   OpenShift Virtualization    4.11.0    kubevirt-hyperconverged-operator.v4.10.0   Succeeded
node-maintenance-operator.v4.10.0          Node Maintenance Operator   4.10.0                                               Failed


Version-Release number of selected component (if applicable):
v4.11.0-334

How reproducible:
100%

Steps to Reproduce:
1. Deploy CNV 4.11.0-334 or later from OSBS.
2.
3.

Actual results:
NMO CSV is failed

Expected results:
see below

Additional info:
Due to this limitation, it has been decided that NMO will still be removed from CNV 4.11 bundle, but it won't be set as a dependency at the OLM level.
If NMO is being used in 4.10.z (i.e. NMO CR(s) exists), HCO will block the upgrade to 4.11 and will raise a descriptive event and upgradeable condition.

temporary W/A to let the NMO CSV be installed in the meanwhile is to patch it to support OwnNamespace InstallMode:
$ oc patch csv node-maintenance-operator.v4.10.0 --patch '{"spec":{"installModes":[{"supported":true,"type":"OwnNamespace"},{"supported":false,"type":"SingleNamespace"},{"supported":false,"type":"MultiNamespace"},{"supported":true,"type":"AllNamespaces"}]}}' --type=merge