CTF-v6: Rename schema types

[axe312ger]

This is part of #30855 and renames all types closer to what the Contentful GraphQL API does

Breaking changes / steps to migrate

New content type naming pattern

The old naming pattern for generated node types based on your Contentful content model was pretty simple. This gave us shorter queries, but came with restrictions for content type names. Content type names like entity, reference, tag, asset did cause problems or simply did not work.

1. Generated GraphQL node types are now prefixed with ContentfulContentType instead of Contentful
2. Hardcoded types and interfaces stay short. For example: ContentfulEntry, ContentfulAsset, ContentfulLocation or
   ContentfulRichText

This is close to the behaviour of the Contentful GraphQL API:

If the generated name starts with a number or collides with a reserved type name, it gets prefixed with 'ContentType'

Instead of doing this on a collision, we always prefix for consistency.

export const pageQuery = graphql`
  query {
-    allContentfulProduct {
+    allContentfulContentTypeProduct {
       ...
    }
  }
`