[!!!][TASK] Remove image caption alignment

!!! Removes the caption alignment property from
image / text with image node types.

Instead of having a specific property for caption alignment,
we instead wrap the text in a p tag which can then adjusted
with Aloha to align the text.

Change-Id: I12b1ecef1a12aa3b11f93366852b02ad7b927688
Resolves: #49927
Reviewed-on: https://review.typo3.org/22737
Reviewed-by: Aske Ertmann
Tested-by: Aske Ertmann
Tested-by: Mr. Hudson
Reviewed-by: Adrian Föder
Reviewed-by: Markus Goldbeck
Reviewed-by: Sebastian Kurfuerst
[WIP][FEATURE] Content translation