dh_clean: Remove debhelper logs for all packages, including packages not being acted...

dh_clean: Remove debhelper logs for all packages, including packages not being acted on. dh can sometimes produce such logs by accident when passed bundled options (like "-Nfoo" instead of "-N foo") that it does not understand; and it was not possible to fix that for any compat level before v8. But also, such logs can occur for other reasons, like interrupted builds during development,  and it should be safe to clean them all. Closes: #623446