nfd-operator: update to v0.3.0

[marquiz]

Operatorhub still shows the ancient v0.2.0. We need to update to v0.3.0 ASAP

/assign ArangoGutierrez

[openshift-ci]

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In response to this:

Operatorhub still shows the ancient v0.2.0. We need to update to v0.3.0 ASAP

/assign ArangoGutierrez

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