test suite: Fix trustingpolicy-replay & dput-ng.

Specifically:

 * Only dput-ng actually complains about the existence of .upload
   files.  dput itself just says there is nothing to do and calls that
   success.

 * The call to t-rm-dput-dropping was in the wrong place.  t-commit
   bumps the version to 1.1 but it's 1.0 that needs removing.

Closes:#903007.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>