Allow rename transform to rename multiple types into a single one

[chompy18]

Based on #1414 , one way to tackle the fragments issue is to allow the rename transform to rename multiple type into a single one - that will allow a manual process of renaming only the types that match and use fragments on the resulting type.
I saw regex can be used, but that might also affect unrelated types so Translations(.*) will affect Translations, TranslationsListListItem and TranslationsInput, while we only want to affect Translations, TranslationsListListItem .

So the SDL in #1414 could rename be presented as:

type Query {
  # get translations
  #
  # Equivalent to GET /translations/{translation_id}
  getTranslationById(translationId: String): Translation

  # get translations list
  #
  # Equivalent to GET /translations/list
  getTranslationsList(
    # Auto-generated argument that limits the size of returned list of objects/list, selecting the first `n` elements of the list
    limit: Int
  ): [Translation]
}

type Translation {
  displayName: DisplayName
  id: String
  key: String
  platform: [String]
  title: String
}

type DisplayName {
  en: String
  he: String
}

Another issue, is that currently it is not possible to rename into an existing type, but the above should basically allow to rename TranslationsListListItem to Translation even though it exists.