BUGFIX: Add missing type converts for asset subtypes

[Sebobo]

This prevents the raw data from being base64 encoded into the rendered output of the Neos backend and included in xhr requests from the Neos UI.

Additionally the default settings for editor and constraints makes the usage of those affected types easier in nodetype properties.

Resolves: #5006

Review instructions

Example nodetype to use in the Neos backend with the raw content mode:

'Neos.Demo:Content.Test':
  superTypes:
    'Neos.Neos:Content': true
    'Neos.Demo:Constraint.Content.Column': true
    'Neos.Demo:Constraint.Content.Main': true
  ui:
    label: Test
    icon: picture
    position: start
    inspector:
      groups:
        settings:
          label: Test Settings
  properties:
    video:
      type: Neos\Media\Domain\Model\Video
      ui:
        label: 'Video'
        reloadIfChanged: true
        showInCreationDialog: true
        inspector:
          group: 'settings'
          editor: Neos.Neos/Inspector/Editors/AssetEditor
    document:
      type: Neos\Media\Domain\Model\Document
      ui:
        label: Document
        inspector:
          group: 'settings'
          editor: Neos.Neos/Inspector/Editors/AssetEditor
    audio:
      type: Neos\Media\Domain\Model\Audio
      ui:
        label: Audio
        inspector:
          group: 'settings'
          editor: Neos.Neos/Inspector/Editors/AssetEditor

Without the change in this PR, setting the 3 properties will each increase the size of the preview html and node change requests.
Also errors are thrown if the editor for each property is not defined.

With this change, the size of the output does not increase and the editor does not need to be defined anymore.

[kdambekalns]

👍 by 👀

[nezaniel]

Makes a lot of sense, already ran into the configuration hassle myself lately