Fuse Operators don't show up after upgrading to OCP 4.6

This issue is caused by a problem within Openshift itself. It's document here:
 
https://bugzilla.redhat.com/show_bug.cgi?id=1891993 
https://bugzilla.redhat.com/show_bug.cgi?id=1891995

Workaround

I had to force a refresh of the Operatorhub to get the correct listings. We might want to add a release note.

I was still presented only with the `alpha` channel when creating a new subscription. This can be resolved by running

oc patch operatorhub/cluster --type=merge -p '"spec": {"disableAllDefaultSources": true}'

Wait until operatorhub lists no sources/only custom sources and run:

oc patch operatorhub/cluster --type=merge -p '"spec": {"disableAllDefaultSources": false}'

This should force the reload of all catalogs and the fuse-product.7.7.x channel will show up.