Resources with failing tests (bridgestrap/onbasca) should be explicitly marked as `gone`

Resources that fail bridgestrap and/or onbasca tests are not distributed according to the functionality here but as far as I can tell are not marked as gone explicitly anywhere. Instead resources are determined to be gone when they have been pruned based on their expiration but this is based on when a resource's bridge descriptors expire rather than when a resource is failing for other reasons. If resources are no longer distributed, they should be marked as gone to ease syncing with distributors. This functionality is particularly important for systems like Lox that maintain some internal bridge distribution state.