Don't report missing packages on apt for packages no longer in an active Apertis release

https://phabricator.apertis.org/T10084

bin/packaging-check-invariants

@@ -1043,6 +1043,19 @@ class InvariantChecker:
         if not set(package).intersection({"git", "obs", "published"}):
             return
         if "published" not in package:
+            if package.git.default_branch:
+                default_branch = package.git.default_branch
+                channels = set(package.git.branches).intersection(self.data.channels)
+                active_channels = [
+                    name
+                    for name in channels
+                    if channel_is_active(self.data.channels[name])
+                ]
+                if default_branch not in active_channels:
+                    logging.info(
+                        f"{package.name}: ignoring missing package on apt: no longer in an active Apertis release: {package.git.default_branch}"
+                    )
+                    return
             self.error(package.name, Report.APT_PACKAGE_MISSING)
             return
         if "obs" not in package: