fix: Grafana component names

[tumido]

Similar to #31

There's no grafana-instance component upstream.

https://github.com/opendatahub-io/odh-manifests/tree/master/grafana
https://github.com/opendatahub-io/odh-manifests/blob/master/tests/setup/kfctl_openshift.yaml

[cfchase]

@tumido did you test this out? Unfortunately I merged this, but I'm still seeing a grafana-instance component in my installation. @LaVLaS maybe you can clarify this?

https://github.com/opendatahub-io/odh-manifests/blob/master/tests/setup/kfctl_openshift.yaml#L48

[tumido]

Hm.. I'm pretty sure I saw grafana-operator in there before, but sure it doesn't say it as well as nowhere in the history of that file... Which is weird.

Anyways. On the other hand the documentation is consistent with this PR here. Which is confusing even more. You're right @cfchase, we probably need some more clarity on this and a naming convention would help... I've filed an issue here with comparison table listing further inconsistencies: https://github.com/opendatahub-io/odh-manifests/issues/270