We want to delete some CI jobs: 1. make all the CI jobs explicit using include (rather than the mix of matrix and non-matrix jobs we have right now) * we might want to backport this change, so future CI backports are easier 2. delete one of each pair of similar jobs with no options, rust, distcheck, and module-dirauth Then we want to add or change some CI jobs in other tickets: * legacy/trac#30860: change the chutney CI job so it runs on macOS using IPv6 * legacy/trac#31851: add a CI job for --disable-relay-mode