Update UploadWizard-specific messages

Update UploadWizard-specific messages

Merge after I706d76ab4720a94e772d03196c91697d9047f5b9 in UploadWizard.

Two messages lost a silly link and $2 parameter:
* api-error-duplicate
* api-error-duplicate-archive

They were both confusingly phrased, as if the link led directly to the
file; instead, at least in UploadWizard, clicking on it opened a popup
dialog with a list. I don't expect the change to be problematic, the
few translations that I understand work equally well with the link
removed, and UploadWizard code can now handle both versions. I'm not
aware of any uses elsewhere, hopefully this makes the messages less
UploadWizard-specific and more reusable.

Two messages were removed because they are no longer used in Gerrit extensions::
* api-error-duplicate-archive-popup-title
* api-error-duplicate-popup-title

Bug: T34606
Change-Id: I9661f24323371f186976df1f5569aba002d4f34e