A broken catalogsource is impacting an independent operator of another catalogsource

- A broken catalogsource is not allowing to install an independent operator which is part of another catalogsource.
- After deleting a broken catalogsource, able to install an independent operator.
- This could have a big impact on the cluster in case that something is broken and have not seen it. 

1. Create broken catalogsource

$ cat catsrc-test.yaml
apiVersion: operators.coreos.com/v1alpha1
kind: CatalogSource
metadata:
  name: simple-broken-catsource
  namespace: openshift-marketplace
spec:
  image: registry/image:v1
  sourceType: grpc
  updateStrategy:
    registryPoll:
      interval: 1440m

$ oc apply -f catsrc-test.yaml
______________________________________________

2. Create subscription

$ cat sub-test.yaml
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: simple-broken-subscription
  namespace: openshift-operators
spec:
  channel: stable
  name: simple-broken-subscription
  source: simple-broken-catsource  
  sourceNamespace: openshift-marketplace

$ oc apply -f sub-test.yaml
______________________________________________

couldn't retrieve grafana sub from web console, reported:

~~~
Error getting YAML: YAMLException: unacceptable kind of an object to dump [object Undefined]
~~~

grafana sub as pulled from API:
~~~
- apiVersion: operators.coreos.com/v1alpha1
  kind: Subscription
  metadata:
    creationTimestamp: "2023-09-06T20:33:52Z"
    generation: 1
    labels:
      operators.coreos.com/grafana-operator.grafana-tester-2: ""
    name: grafana-operator
    namespace: grafana-tester-2
    resourceVersion: "2107267"
    uid: c0cc6b6f-3b3c-4e59-93a1-dba23264e722
  spec:
    channel: v4
    installPlanApproval: Automatic
    name: grafana-operator
    source: community-operators
    sourceNamespace: openshift-marketplace
    startingCSV: grafana-operator.v4.10.1
...
    conditions:
    - lastTransitionTime: "2023-09-06T20:33:52Z"
      message: all available catalogsources are healthy
      reason: AllCatalogSourcesHealthy
      status: "False"
      type: CatalogSourcesUnhealthy
    - message: 'failed to populate resolver cache from source simple-broken-catsource/openshift-marketplace:
        failed to list bundles: rpc error: code = Unavailable desc = connection error:
        desc = "transport: Error while dialing dial tcp xxx.xx.xxx.xx:50051: connect:
        connection refused"'
      reason: ErrorPreventedResolution
      status: "True"
      type: ResolutionFailed
    lastUpdated: "2023-09-06T20:33:52Z"
~~~

- It looks like when a CatSrc pod specifically fails due to the source image being missing, the OLM fails to update Subscriptions of any sort. Once faulty CatSrc was removed, reinstalling Subscription resulted in successful installation. 

A broken catalogsource is not allowing to install an independent operator

A broken catalogsource should not have impact on another independent operator of an another catalogsource.