mediawiki.Upload.BookletLayout: Handle errors from TitleBlacklist (HACK)

This code really really shouldn't be here, or in fact shouldn't be
needed at all. But we're currently offering really awful user
experience, and given how expansive Commons' title blacklist is, we
have to do better now and not when we get to rewrite everything.

Since the default TitleBlacklist error message really sucks and
Commons replaces it with something that jqueryMsg can't handle, reuse
a message from UploadWizard, mwe-upwiz-blacklisted, duplicated here
as api-error-blacklisted.

Bug: T114940
Change-Id: I8a7723abde124e8ff21e404dfc2efb8506f8dd75