VizPanel: Do not apply the visualization's field config to annotation data frames

[javiruiz01]

• Avoid adding default fieldConfig to annotations, follow what we do in grafana (link)

Why? When adding links to a panel like so:

fieldConfig: {
  defaults: {
    ...
    links: [
      {some link}
    ],
  },
},

The links were getting added not only to the series, but also to each field in the annotations, resulting in the annotation having repeated links that did not belong there.

[torkelo]

Wont this undo #540 ?

[javiruiz01]

Actually it still works since we're still running the field overrides, it's just that we won't be applying the default config to the annotations, before we were not running applyFieldOverrides at all, that's why it was breaking

[javiruiz01]

I updated the test by adding a link to the annotations test data to ensure we're not losing it after calling applyFieldOverrides

[grafanabot]

🚀 PR was released in v4.5.0 🚀