Add transformations to annotations dataframes

[javiruiz01]

• Add transformations to annotations dataframes
• Keep compatibility with previous transformations defined as CustomTransformOperator, we just send them normal dataframes

Valid transformations array could now look like:

transformations: [
  {
    operator: () => (source: Observable<DataFrame[]>) => source.pipe(map((frames) => frames)),
    topic: DataTopic.Annotations,
  },
  {
    id: DataTransformerID.organize,
    options: {
      excludeByName: {},
      indexByName: {},
      renameByName: {},
      includeByName: {},
    },
    topic: DataTopic.Annotations,
  },
  sortFramesTransformation,
  addTWCFieldSeriesIndexTransformation,
  addDefaultSeriesNameTransformation,
],

Fixes #451

📦 Published PR as canary version: 3.14.0--canary.651.8356712670.0

✨ Test out this PR locally via:

npm install @grafana/scenes@3.14.0--canary.651.8356712670.0
# or 
yarn add @grafana/scenes@3.14.0--canary.651.8356712670.0

[dprokop]

Tested this and it looks good, thank you for the contribution @javiruiz01!

[grafanabot]

🚀 PR was released in v3.14.0 🚀