CatalogMetadata fails to sync on operatorhubio catalog

[joelanford]

I enabled the CatalogMetadataAPI feature gate, applied the operatorhubio catalog in this repo, and noticed that it failed to sync. I found two issues:

1. There is a splunk bundle object that was too large to apply (it exceeded the etcd size limit)
2. There is a postgres operator channel name with an underscore in it, which is an invalid character for a metadata.name. Syncing fails when trying to create an object for this channel.