add styleProperties as a top level field

[dario-daza]

Proposed Changes

This PR add the styleProperties field to be queried outside the _map object of the contentlet like this:

query getPageData($url: String!) {
  page(url: $url) {
    containers {
      containerContentlets {
        contentlets {
          identifier
          title
          styleProperties # outside map field
        }
      }
    }
  }
}

Checklist

• GraphQLTests.json‎: add test for top level style properties in graphql request.
• ContentFields.java: Include StyleProperties in the contentFields of the Contentlets.
• Contentlet.java: Create new constant for the name "styleProperties"

This PR fixes: #33696

This PR fixes: #33696

[wezell]

Dario proved out that StyleProperties are not stored in the main cached version of the contentlet - nice work.