Exclude forced-version field when comparing package metadata

This is necessary to avoid false positives when detecting new packages
to build in CI

This commit can be reverted after # is merged

Author: neilmayhew

scripts/compare-package-metadata.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-OLD=$(cat "$1")
+OLD=$(jq -c 'map(del(."forced-version"))' "$1")
 NEW=$(cat "$2")
 COMBINED="{ \"old\": $OLD, \"new\": $NEW }"