[TASK] Migrate CTypes text, image and textpic to textmedia

With EXT:fluid_styled_content CE image and textpic is dropped in favor
of CType textmedia.

This change introduces an Upgrade Wizard to migrate all existing text,
image and textpic CE to type textmedia.

Resolves: #67954
Releases: master
Change-Id: Ie86812718e34026ed3f00121c510d386b5bcdff6
Reviewed-on: http://review.typo3.org/40960


Reviewed-by: Sascha Egerer <sascha@sascha-egerer.de>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>