Publish .orig-$component.tar.*.asc files as well

The freetype Debian package uses multi-component orig tarballs, and also includes PGP signatures for them:

freetype_2.10.4+dfsg-1+deb11u1+apertis0.debian.tar.xz
freetype_2.10.4+dfsg-1+deb11u1+apertis0.dsc
freetype_2.10.4+dfsg.orig-ft2demos.tar.xz
freetype_2.10.4+dfsg.orig-ft2demos.tar.xz.asc
freetype_2.10.4+dfsg.orig-ft2docs.tar.xz
freetype_2.10.4+dfsg.orig-ft2docs.tar.xz.asc
freetype_2.10.4+dfsg.orig.tar.xz

However, at publishing time OBS was ignoring these .orig-$component.tar.*.asc files, causing the archive manager (reprepro or aptly) to fail since it was not getting some of the files listed in the .dsc.