Skip retained published archives when planning builds

bin/check-versions

@@ -172,8 +172,8 @@ check_package() {
   # it because that exact filename is already published with different bytes.
   # If the artifact for this version already exists in the channel, there is
   # nothing to build regardless of which direction the versions differ.
-  if compgen -G "$REPO_ROOT/$mirror/$ARCH/${pkg}-${pkgbuild_version}-*.pkg.tar."[!s]* >/dev/null 2>&1; then
-    print_warning "$pkg $pkgbuild_version is already published — this checkout is behind the channel; not queueing"
+  if package_version_is_published "$REPO_ROOT/$mirror/$ARCH" "$pkg" "$pkgbuild_version" "$ARCH"; then
+    print_warning "$pkg $pkgbuild_version is already published; not queueing"
     return 1
   fi