When requesting previews, which we don't find in oc_previews, search in
IAppData first before creating them.
Move the logic from MovepreviewJob to PreviewMigrationService and reuse
that in the Preview Generator.
At the same time rename MovePreviewJob to PreviewMigrationJob as it is a
better name.
Signed-off-by: Carl Schwan <carl.schwan@nextcloud.com>
(cherry picked from commit 6149168129)
