[TASK] Split DataHandler::copyRecord_procBasedOnFieldType

[TASK] Split DataHandler::copyRecord_procBasedOnFieldType

This is the first part to get this method down to an understandable
size. The two factored out methods should be further simplified/split
up.

Resolves: #67510
Releases: master
Change-Id: Ice6692cf916591687aaaf9296d8834ef3d352ca5
Reviewed-on: http://review.typo3.org/40311
Reviewed-by: Daniel Maier <dani-maier@gmx.de>
Tested-by: Daniel Maier <dani-maier@gmx.de>
Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>