### Check existing issues - [x] I've verified that this request isn't described by any existing issues. ### Request Update craft-parts and add a core22 and core24 spread test to exercise the new Ruby plugin. This could be added onto - (core22) https://github.com/canonical/snapcraft/blob/main/tests/spread/plugins/craft-parts/build-and-run-hello/task.yaml - (core24) https://github.com/canonical/snapcraft/blob/main/tests/spread/core24-suites/plugins/build-and-run-hello/task.yaml There is an old Hello World ruby snap; it was hardly worth finding as it's so simple: https://github.com/canonical/snapcraft/blob/6.1/tests/spread/plugins/v1/ruby/snaps/ruby-hello/ruby-hello.rb ### The problem it solves To ensure the Ruby plugin works as-expected.