Do not reveal RevDeled file title

When an file is being uploaded, we tell the user if it has been
uploaded and deleted in the past. But we shouldn't reveal the title
under which that was done if the file was suppressed via RevDel.

Note this introduces a breaking API change: clients may now receive a
"deleted-archive" warning with an empty value if the title was
suppressed.

Bug: 59167
Change-Id: I01a3ac2ba0cbac6b28de26a7f1a1d09b6b02097e
Merge "Do not reveal RevDeled file title"