Allow refactoring of references to moved attachments

Currently, when an attachment is moved, a redirection can be persisted, allowing references to the moved resource to keep being accessible through redirections.
It is interesting to also allow references to attachments to be refactored with the new location of the attachment on move.

see https://design.xwiki.org/xwiki/bin/view/Proposal/Attachmentsmoveandrename#HDatabase