Ansible-core devel bumped to 2.18.0.dev0, stable-2.17 branch created

ansible-core’s devel branch’s version has been bumped to 2.18.0.dev0, and a stable-2.17 branch has been created. If you are a collection maintainer, you need to consider:

  1. If you test against devel and have a tests/sanity/ignore-2.17.txt file, you need to copy it over to tests/sanity/ignore-2.18.txt;
  2. Update your CI matrix to include stable-2.17; if you did not test against devel before, potentially need to create a tests/sanity/ignore-2.17.txt file.